❤【A3 Model Two-Side Connection】: Wheelchair Electric Drive Head A3 compact head; using bearing shaft, changing the traditional gear adjustment iron grinding iron, steel balls are used for a longer time, equipped with double discs and double brakes, the brakes are more stable, alternate use, continuous downhill without heating, 7.8AH Battery, 40 km range, no delay in life and travel ❤【A5 Model Connected on Both Sides】: Wheelchair traction head A5 using bearing shaft, changed the traditional gear adjustment iron grinding iron, steel ball longer service life, double shock absorption, long-term driving without fatigue, headlights with bright metal, waterproof mini plug, no worries in the rain, exquisite appearance ❤【A6 Model Center Connection】: Wheelchair Conversion Electric Kit A6 model can be quickly connected; with one-button parking function, double disc double brake, seconds to disassemble and install, fast travel, toothed brushless motor climbing power, 10.4AH battery, can last 50 kilometers ❤【Wheelchair Electric Drive Head】: Electric Handcycle Wheelchair Attachment Kit Made of aluminum alloy, suitable for various wheelchair models, pipe diameter range: 0.98-1.25 inches, there are 3 styles for you to choose, A3: 7.8AH/36V/350W, A5 and A6: 10.4AH/36V/500W, please purchase the appropriate style according to your needs ❤【Humanized Design】:Wheelchair Pull Device Equipped with spotlights and horns to assist night driving, suitable for disabled people, elderly people who have the ability to walk but cannot walk for a long time, and elderly people with inconvenient hands and feet