0ចូលចិត្ត

LSRC GT5 WiFi FPV with Electric Adjustment HD Dual Camera 360° Obstacle Avoidance Optical Flow Positioning Brushless LED Foldable RC Drone Quadcopter RTF

4.7

★★★★★

115

៛164492.87 / ៛200690.13

*Name:
*Email:
*Phone:
*Quantity:
*Content:
Attachment:

Supports JPG, JPEG, PNG, PDF, EXCEL, WORD, RAR, ZIP, 7z formats

៛96271.87 / ៛200690.13

ទិញឥឡូវនេះ បន្ថែមទៅកន្ត្រក

កាតឥណទាន ឬឥណពន្ធ

ធានាសុវត្ថិភាពពេលពិនិត្យចេញ

អំណោយឥតគិតថ្លៃ

អំណោយឥតគិតថ្លៃជាមួយនឹងការទិញណាមួយ

គោលការណ៍ដឹកជញ្ជូន

ដឹកជញ្ជូនស្តង់ដារឥតគិតថ្លៃលើការបញ្ជាទិញលើសពី $9.9

គោលការណ៍ត្រឡប់មកវិញ

ធាតុត្រឡប់មកវិញនឹងត្រូវបានទទួលយកក្នុងរយៈពេល 40 ថ្ងៃនៅពេលដែលជាកាលបរិច្ឆេទនៃការទទួលទំនិញ។ ធាតុដែលបានប្ដូរតាមចំណូលចិត្តមិនអាចត្រឡប់មកវិញ ឬផ្លាស់ប្តូរបានទេ។ ធាតុដែលបានទិញជាមួយកាតអំណោយអេឡិចត្រូនិចអាចផ្លាស់ប្តូរបានតែប៉ុណ្ណោះ; ការបង្វិលប្រាក់មិនអាចអនុវត្តបានទេ។

អំណោយឥតគិតថ្លៃ

សូមស្វាគមន៍មកកាន់ Roymall គេហទំព័រវិជ្ជាជីវៈរបស់អ្នកសម្រាប់ការទិញអំណោយហាងផ្នែកដ៏ឧត្តុង្គឧត្តម។ យើងពិតជាឲ្យតម្លៃ និងថ្លែងអំណរគុណចំពោះការគាំទ្ររបស់អ្នក ហើយយើងចង់បង្ហាញពីការអរគុណរបស់យើងដោយបន្ថែមភាពរំភើបបន្ថែមទៅការទិញរបស់អ្នក។ នៅពេលអ្នកទិញជាមួយយើង អ្នកមិនត្រឹមតែរីករាយជាមួយនឹងផលិតផលដែលមានគុណភាពខ្ពស់ដែលធ្វើឱ្យជីវិតរបស់អ្នកប្រសើរឡើងប៉ុណ្ណោះទេ ប៉ុន្តែអ្នកក៏នឹងទទួលបានអំណោយឥតគិតថ្លៃដែលមានតែមួយគត់ជាមួយនឹងគ្រប់ការបញ្ជាទិញរបស់អ្នក។ ត្រៀមខ្លួនរួចរាល់ដើម្បីស្វែងយល់ពីការប្រមូលរបស់យើង និងស្វែងរកអំណោយដ៏ល្អឥតខ្ចោះរបស់អ្នក? រាវរកការជ្រើសរើសផលិតផលហាងផ្នែកដ៏ឧត្តុង្គឧត្តមរបស់យើង ដាក់ការបញ្ជាទិញរបស់អ្នក និងរង់ចាំភាពរំភើបនៃអំណោយឥតគិតថ្លៃរបស់អ្នកដែលមកជាមួយនឹងការទិញរបស់អ្នក។

គោលការណ៍ដឹកជញ្ជូន

យើងនឹងខិតខំប្រឹងប្រែងដើម្បីដឹកជញ្ជូនធាតុទៅអ្នកបន្ទាប់ពីទទួលបានការបញ្ជាទិញរបស់អ្នក និងធានាថាពួកគេមកដល់ដោយសុវត្ថិភាព។ ព័ត៌មានលម្អិតអំពីការដឹកជញ្ជូននឹងត្រូវបានផ្តល់ឱ្យក្នុងអ៊ីមែលបញ្ជាក់របស់អ្នក។ក្នុងករណីភាគច្រើន ការបញ្ជាទិញត្រូវបានដំណើរការក្នុងរយៈពេល 2 ថ្ងៃ។ក្រោមស្ថានភាពពិសេស វានឹងត្រូវពន្យារពេលដូចខាងក្រោម៖ នៅពេលអ្នកដាក់ការបញ្ជាទិញនៅថ្ងៃសៅរ៍ ថ្ងៃអាទិត្យ ឬថ្ងៃឈប់សម្រាកសាធារណៈ វានឹងត្រូវពន្យារពេល 2 ថ្ងៃ។ជាធម្មតា វាត្រូវការពេលវេលា 5-7 ថ្ងៃធ្វើការ (ច័ន្ទដល់សុក្រ) ដោយមិនរងផលប៉ះពាល់ពីការពន្យារពេលជើងហោះហើរ ឬកត្តាបរិស្ថានផ្សេងទៀត។ដោយសារសេវាកម្មដឹកជញ្ជូនរបស់យើងគឺជាសកល ហេតុនេះពេលវេលាដឹកជញ្ជូននឹងអាស្រ័យលើទីតាំងរបស់អ្នក ដូច្នេះវាអាចត្រូវការពេលវេលាមួយចំនួន ហើយសូមរង់ចាំដោយសេចក្តីអត់ធ្មត់ ប្រសិនបើអ្នកស្ថិតនៅក្នុងស្រុក ឬប្រទេសដាច់ស្រយាល។

1. គោលការណ៍ត្រឡប់មកវិញ & ផ្លាស់ប្តូរ

យើងទទួលយកតែធាតុដែលបានទិញពី roymall.com។ ប្រសិនបើអ្នកទិញពីអ្នកចែកចាយក្នុងស្រុករបស់យើង ឬអ្នកលក់រាយផ្សេងទៀត អ្នកមិនអាចត្រឡប់វាមកយើងវិញបានទេ។ ធាតុលក់ចុងក្រោយ ឬអំណោយឥតគិតថ្លៃមិនអាចទទួលយកសម្រាប់ការត្រឡប់មកវិញបានទេ។ដើម្បីមានសិទ្ធិទទួលបានការត្រឡប់មកវិញ ធាតុរបស់អ្នកត្រូវតែមិនបានប្រើប្រាស់ ហើយនៅក្នុងស្ថានភាពដូចគ្នានឹងពេលអ្នកទទួលបានវា។ វាត្រូវតែនៅក្នុងកញ្ចប់ដើមផងដែរ។បន្ទាប់ពីទទួលបានការណែនាំអំពីការត្រឡប់មកវិញពីយើង សូមវេចខ្ចប់ធាតុដែលអ្នកបានត្រឡប់មកវិញ ហើយទម្លាក់កញ្ចប់របស់អ្នកនៅក្នុងការិយាល័យប្រៃសណីយ៍ក្នុងស្រុក ឬអ្នកដឹកជញ្ជូនផ្សេងទៀត។
យើងនឹងដំណើរការធាតុត្រឡប់មកវិញ ឬផ្លាស់ប្តូររបស់អ្នកក្នុងរយៈពេល 3-5 ថ្ងៃធ្វើការបន្ទាប់ពីយើងទទួលបានវា។ ការបង្វិលសាច់ប្រាក់នឹងត្រូវបានដំណើរការ និងផ្ទេរទៅក្នុងវិធីសាច់ប្រាក់ដើមរបស់អ្នកដោយស្វ័យប្រវត្តិ។មិនអាចទទួលយកការត្រឡប់មកវិញ ឬផ្លាស់ប្តូរបានទេ ប្រសិនបើផលិតផលត្រូវបានផលិតតាមការកំណត់ រួមទាំងទំហំតាមការកំណត់ ពណ៌តាមការកំណត់ ឬបោះពុម្ពតាមការកំណត់។ត្រូវការជំនួយបន្ថែម សូមទាក់ទងមកយើងខ្ញុំ។ service@roymall.com ឬ Whatsapp: +8619359849471

2. គោលការណ៍បង្វិលសាច់ប្រាក់

អ្នកនឹងទទួលបានការបង្វិលសាច់ប្រាក់ពេញលេញ ឬ 100% ឥណទានហាងបន្ទាប់ពីយើងទទួលបាន និងពិនិត្យមើលកញ្ចប់ដែលបានត្រឡប់មកវិញ។ ការបង្វិលសាច់ប្រាក់នឹងត្រូវបានដំណើរការ និងផ្ទេរទៅក្នុងវិធីសាច់ប្រាក់ដើមរបស់អ្នកដោយស្វ័យប្រវត្តិ។សូមចំណាំថាថ្លៃដឹកជញ្ជូន និងការបង់ប្រាក់ឬថ្លៃសេវាណាមួយមិនអាចបង្វិលបានទេ។ ថ្លៃដឹកជញ្ជូនបន្ថែមមិនអាចបង្វិលបានទេ នៅពេលដែលកញ្ចប់ត្រូវបានដឹកជញ្ជូន។ អ្នកគឺជាអ្នកទទួលខុសត្រូវក្នុងការបង់ថ្លៃសេវាទាំងនេះ ហើយយើងមិនអាចលើកលែង ឬបង្វិលវាបានទេ ទោះបីជាការបញ្ជាទិញត្រូវបានត្រឡប់មកយើងវិញក៏ដោយ។នៅពេលដែលយើងបានទទួល និងបញ្ជាក់អំពីធាតុដែលបានត្រឡប់មកវិញរបស់អ្នក យើងនឹងផ្ញើអ៊ីមែលមួយទៅអ្នក ដើម្បីជូនដំណឹងថា យើងបានទទួលធាតុដែលបានត្រឡប់មកវិញរបស់អ្នក។ យើងក៏នឹងជូនដំណឹងដល់អ្នកអំពីការអនុម័ត ឬការបដិសេធនៃការបង្វិលសាច់ប្រាក់របស់អ្នកផងដែរ។ប្រសិនបើអ្នកមានបញ្ហាណាមួយទាក់ទងនឹងដំណើរការបង្វិលសាច់ប្រាក់ សូមទាក់ទងមកយើងខ្ញុំ។ service@roymall.com ឬ Whatsapp: +8619359849471

LSRC GT5 WiFi FPV with Electric Adjustment HD Dual Camera 360u00b0 Obstacle Avoidance Optical Flow Positioning Brushless LED Foldable RC Drone Quadcopter RTF

Specifications:

Brand Name: LSRC

Item NO.: GT5

Color: Black

Material: Plastic, Metal, Electronic Components

Frequency: 2.4G

Channel: 4CH

Gyro: 6-Axis

Motor: 1503 4000KV Brushless Motor

Quadcopter Battery: 3.7V 750mAh Lipo (Included)

Flying Time: About 14mins

Charging Time: About 60mins

Remote Control Mode: Mode 2 (Left Hand Throttle)

Remote Control Battery: 3 * 1.5V AA Battery (NOT Included)

R/C Distance: About 100m

FPV: 2.4G WiFi

FPV Distance: About 50m

Camera(Optional): 4K (480P), 6K (720P)

Adjustable Angle: 90u00b0 Adjustable by Transmitter

Quad"s Size: 130 x 83 x 65mm (Foldable), 250 x 225 x 65mm (Unfoldable)

Take-off Weight: 136g

Package Size: 18 x 22.5 x 7.5cm

Package Weight: 423g

Features:
1. The front lens is collocated with 4K WIFI high-definition wide-angle, the bottom high-definition lens with optical flow can switch the camera angle.
2. Electric adjustment of the camera angle for a wider shooting range.
3. The height fixing function has the function of height keeping mode, and the optical flow positioning and fixed-point function have stable flight.
4. 3.7V 800mAh ultra-long endurance lithium-ion battery, which can last for about 14 minutes.
5. Customize the route. You can draw the picture you want to fly on the APP.
6. MOBILE PHONE APP control, one-key back, headless mode, ascending and descending, forward and backward, left and right sideward flight.
7. Hand gesture photography, optical flow positioning, brushless motor, ultra-long endurance, head-mounted obstacle avoidance, which can stop when encountering obstacles without colliding with obstacles.
8. Brushless motor provides more powerful power and longer service life.
9. The size and weight of the product are light, and the body weight is 136G, which can bypass national aviation control (some countries require certification or registration for UAVs over 250g, and 136G can eliminate the challenge of certification and registration).
10. 2.4GHz anti-interference technology, six-axis gyroscope, more stable flight, more convenient control.
11. Low battery alarm, the remote controller will issue an alarm sound when the battery is low.
12. The dazzling lights on the body make the drone shine even more at night.

Function: up / down, front / back, left / right turn, lateral flight, three-level flight speed, around flight, waypoint flight, altitude hold mode, headless mode, one key return, one key take off and landing, WiFi FPV, dual camera / video, Infrared Obstacle Avoidance, Optical Flow Positioning, Brushless Motor

Package Included:
1 x GT5 Quadcopter
1 x Remote Controller
1 x 3.7V Lipo Battery

1 x USB Charging Cable
2 x Spare Propellers
1 x Screwdriver

1 x Storage Bag

ទិញជាមួយ Paypal

Products related to this item

Loading related products...

Outdoor Magnetic Camping Lamp Rechargeable Flashlight Solar Absorption Cob Usb Portable Multifunctional Wide-Angle Work Light

$3.50

LHI Tactical Military Backpack for Men 25L/45L Large Molle Army Assault Pack 3 Day Hiking Rucksack With Bottle Holder

$31.99

Vizari Dynamo Soccer Shorts for Boys and Girls | Adjustable Fit Youth Shorts for Multiple Sports Activities - (color: Red, size: X-Small)

$9.89

Airtag Bike Mount, Bike Reflectors Holder for Apple Airtag, Hidden Bike GPS Tracker Case for Apple Airtag, Bicycle Wheel Reflectors for Bike Anti-Theft

$14.44

MC40 Indoor Digital Temperature Humidity Meter with Stand Magnet Portable House Office Temperature Monitor Thermometer Hygrometer

$4.00

Surpass Hobby Rocket 540 Sensored Brushless Motor V3 Shaft 3.175mm RC Car Part

$26.24

Carslan Water Kiss Moisturizing Lipstick

$42.57

WRITECH Ballpoint Pen Medium Point: 1.0mm Retractable Black Blue Red Ink Color 8ct Smooth Writing Low Viscosity Ink Ballpoint Pens

$9.89

Wrist and Ankle Weights Adjustable for Women: Wearable Arm & Leg Weights for Yoga Pilates Walking Dance - Silicone Weighted Bracelet Set for Home Gym,Pack of 2, 2Lbs

$28.56

Upgraded Metal Anti Roll Bar Set for Wltoys 124008 124010 124019 144001 1/12 1/14 RC Cars Vehicles Models Spare Parts

$6.99

Front Car Seat Covers, Universal Leather Seat Covers with Headrest Pillows for Most Cars SUVs Pickup Trucks, Full Coverage Car Seat Protectors, 2 Seats Car Seat Cushion,Grey

$60.00

5V Ultrasonic Suspension Parts DIY Learning Kit Electronic Production DIY Kit Mini Levitator Set

$2.50

Shanghai Old Eight Cakes Gift Box

$33.10

KLUBI Elephant Gifts for Women - Your Argument Is Irrelephant Mug 12oz White Elephant Gifts for Adults Funny Elephants Lawyer Gifts for Women Elephant Coffee Mug Elephant Cup Gifts for Lawyers Woman

$8.49

Conair Instant Heat Curling Iron Brush, 1 1/4-Inch Barrel - For Use On Short to Medium Length Hair

$17.99

Floating Desk Toy Home Decoration Gravity Defying Kinetics Desk Toy Desktop Levitating Gyro Stress Reliever Kinetics Levitation Toy Optical Illusion Desk Toy

$14.99

Huohuotu children's early education machine

$59.34

luvamia Bermuda Shorts for Women High Waisted Linen Dressy Casual Pleated Wide Leg Summer Shorts with Elastic Waist - (color: Dark Blue, size: XX-Large)

$14.49

Delta Children Spidey and His Amazing Friends Plastic Basketball Set Includes Basketball Hoop, 1 Basketball and Ball Pump

$24.04

Roseonly Eternal Rose Gift Box

$551.88

PRETTYGARDEN Women's Summer Casual Short Flutter Sleeve Round Neck Smocked Waist Tiered Boho Floral Flowy Maxi Dress - (color: Floral Black and Red, size: X-Large)

$18.44

RAVS 36 Inch Indoor Kids Trampoline for Toddler Updated Full Foam Covered Handle Foldable Small Rebounder Garden Outdoor Easy Quick Setup

$55.99

1/3/6/10pcs ESP32 WROOM-32 ESP32-S Development Board WiFi+bluetooth-compatible TYPE-C ESP32 30Pin ESP32 Nodemcu Development Module

$1.30

Excellway 1000W 24/48V Wind Turbine Controller Wind Controller for Home/Camping

$38.99

RS422 to TTL Transfers Module Bidirectional Signals Full Duplex 422 to Microcontroller MAX490 TTL Converter Module

$4.99

JOVS Skin Rejuvenation Photon Beauty Device

$1117.57

vizethru 6 pcs Easter Bunny Plush Toys Decorations Cute Animal Bunny Stuffed Doll Easter Basket Stuffers Gift for Kids (6 inches)

$12.99

Outdoor Camping Chair Armrest Storage Bags Portable Beach Chair Side Hanging Bags for Fishing Camping Hiking Organizer Pouch

$3.52

Everest Cat5e RJ45 Pass Through Connector 200-Pack - EZ Cat 5e Pass Through RJ45 Connectors - Cat 5e Connectors - Ethernet Connector, Ethernet Plug - for Solid or Stranded UTP Network Cable

$23.76

adidas Men's Racer TR23 Sneaker, Ivy/Ivy/Carbon, 6.5

$39.99

Bedsure Twin Sheets Set - 3 Pieces, Soft & Cooling Twin Sheets, Luxury Cationic Dyed, Deep Pockets & Easy-Fit, Breathable & Wrinkle Free, Grey

$14.99

ZANZEA Plus Size Women Long Dress Casual Loose Plaid Print O-Neck Half Sleeve Beach Maxi Dress

$12.99

❮

❯

Videos for similar product

Loading product videos...

MUNBYN Label Holder for Rolls and Fan-Fold Labels, Shipping Label Roll Holder for Desktop Label Printer Shipping Supplies Industrial Labels, Pink

White Bluetooth Mouse, Rechargeable USB Wireless and BT5.0/3.0 Dual Mode Mouse with RGB Light, Side Buttons, 2400 DPI, Ergonomic Cordless Computer Gaming Mice for Laptop Windows PC Mac MacBook iPad

Womens Faux Leather Leggings - High Waisted Black Leather Pants Sexy Tummy Control Stretch Comfy Pleather Tights - (fit type: 27" Inseam, color: Black Matte Faux Leather Without Hidden Pockets, size: Small)

MANCYFIT Thermal Underwear for Boys Fleece Lined Long Johns Set Kids Base Layer Ultra Soft - (color: Black, size: X-Small)

PRETTYGARDEN Women's Summer 2 Piece Outfits 2025 Cap Sleeve Ruched Slim T Shirt Ribbed Knit Wide Leg Pant Sets Tracksuit - (color: Wine Red, size: Small)

CHI Magnified Volume Finishing Hair Spray, Boosts Volume & Body For Maximum Fullness, Builds Resilience & Strength & Adds Shine, 12 Oz

Charmo Women's One Piece Swimsuit Zipper Front Bathing Suits Square Round Neck Swimwear Low Back Monokini - (color: Red, size: Large)

WIBIMEN Mini Ice Cube Trays, Small Tiny Round Pebble Crushed Nugget Ice Trays for Freezer with Lid - Chilling Drinks Coffee Juice(4 Pack/0.55In - Black)

Talking bunny doll

Wrist Weight Sets, 1LB Each Set of 2, Ankle Weights Improve Workout Effectiveness, Wrist Weight for Women, Wearable Arm & Leg Weights for Yoga, Barre Walking Running

WDW Magazine 2025 Wall Calendar - With Bonus Trip Planning and Celebration Stickers for Disney World, Disneyland, Disney Cruise, Birthdays

8'' Large Ceramic Piggy Bank for Adults, NO Toxic No Need Break to Open, Alcancias de Dinero para adultos, Money Saving Bank for Adults, Honeymoon Fund Box- Time to Fly

Customized Chinese Zodiac Brass Seal

German DEOU nail clipper set

Tankaneo Womens Ribbed Knit Tank Tops Button Down Vest Summer Casual Slim Fit Crop Sleeveless Shirts - (color: Red, size: Small)

Zenlonr Women's 2025 Fall Winter Striped Sweater Long Sleeve Off Shoulder Loose Knit Pullover Tops - (color: Beige, size: Small)

Chinese antique lacquerware small screen

Magnetic levitation induction cat night light

Wireless Earbuds Bluetooth 5.3 Ear Buds, Bluetooth Headphones with LED Display Charging Case, 40Hrs Playtime Stereo Sound, IPX7 Waterproof in-Ear Earphones with Mic for Phone Tablet Sports, White

MLANM Men's Henley Knit Sweaters Long Sleeve Pullover Sweater Casual Fashion Thermal Sweaters - (color: A05-navy, size: XX-Large)

Tankaneo Womens Striped Quilted Jackets Oversized Lightweight Button Down Puffer Shackets Casual Fall Winter Outerwear - (color: Black, size: Medium)

Women's Golf Shirt Long Sleeve Polo Shirt UPF50+ Sun Protection Moisture Wicking Quick Dry Golf Polo Shirt - (color: Dusty Purple, size: XX-Large)

AIITLE Small Harness for Puppy with A Leash - Spring Dog Vest Harness with Super Breathable Mesh, Reflective No-Pull Pet Harness for Outdoor Walking, Camping for Small Dogs, Cats Pink XXS

AZUREBEAUTY 130 Pcs Dip Powder Nail Kit 16 Colors Clear Glitter Pink Nail Dip Powder Kit with Top/Base Coat Activator Gel Nail Remover Professional Dip Powder Liquid Set for Home Salon Gifts

YESPER Car Jump Starter with Air Compressor, 2000A Peak Portable Jump Pack with 150PSI Digital Tire Inflator, 12V 12000mAh Battery Charger Jumper Starter for Up to 8L Gas & 6L Diesel Engines

Dove Advanced Care Antiperspirant Deodorant Stick Clear Finish 4 Count deodorant that doesn’t stain clothes 72-hour odor control and all-day sweat protection with Pro-Ceramide Technology 2.6 oz

6IN1Pet Hair Remover Tool, Animal Fur Removal Tool,Pet Hair Remover Broom Pet Hair Removal for Car Rug,Dog and Cat Hair Remover,Couch,Furniture,Carpet Pet Hair Removal Brush Tool(8.27inches)

Learning Resources Sorting Surprise Picnic Baskets, Toddler Sorting & Matching Skills Toy, Fine Motor Skills, Preschool Educational Toys, 32 Pieces, Ages 3+

SUPER Sneaker Cleaning Kit

Nilight 48”/49” LED Tailgate Light Strip 90 LED Red/White for Running Light Brake / Turn Signal / Reverse Light,2 Years Warranty

Cakulo 2024 Oversized Sweatshirts For Women Loose Fit Fall Fashion Crewneck Long Sleeve Casual Cute Bow Tunic Tops - (color: White, size: X-Large)

Happy Sailed Womens Tweed Blazers Casual Long Sleeve Double Breasted Open Front Blazer Jackets Work Suits - (color: Brown, size: XX-Large)

❮

❯

Toys Hobbies & Robot Ranking

10 Liked Added to Cart
Homemade Submarine DIY Technology Physics Simulated Educational Manual Toys Stem Experiment Ability Tools Gift Kids Children Science Assemble Submarine
៛11437.05/ ៛29335.030
20 Liked Added to Cart
16 Swash Plate Stirling Engine Model Science Discovery Technology Puzzle Novelty Toys
៛746377.87/ ៛969340.150
30 Liked Added to Cart
M17 1.6cc Mini Micro Hit and Miss Engine Evaporated Water-cooled Four-stroke Horizontal Gasoline Engine Internal Combustion Engine Model M17B Gasoline Engine Internal Combustion Engine Model - Speed Adjustable
៛1035313.87/ ៛1419759.270
40 Liked Added to Cart
HX-15 Stirling Engine Helicopter Model Assembly Kit Physical Air Energy Combustion Engine with Black Walnut Solid Wood Base Technology Educational Creative Toys
៛437376.87/ ៛592358.930
50 Liked Added to Cart
HuiNa 1573 RC Car 1/14 Trucks Bulldozer Charging RTR Truck Construction Vehicle Kids Toys
៛393233.87/ ៛842047.790

More Toys Hobbies & Robot

LSRC GT5 WiFi FPV with Electric Adjustment HD Dual Camera 360° Obstacle Avoidance Optical Flow Positioning Brushless LED Foldable RC Drone Quadcopter RTF