MP-A2 one wheel electric scooter is smart drive , to be  attached and detached to  the manual wheelchair , transform your wheelchair to power wheelchair with electrical assistance . 

The controller inside is intelligent , it can detect your movement and the motor will start and offer you power assistance within 0.5 second . 

A.When push the wheelchair, the controller will automatically detect the running state of the wheelchair and start the motor, pushing the wheelchair forward, to achieve the assistance effect.
B.When the need for wheelchair automatically forward, only the continuous application of the wheelchair thrust, wheelchair can be based on the actual situation before the uniform.
C.When the wheelchair backward sliding, the controller will automatically lock the motor, the faster backward sliding speed, the greater lock force for motor, to prevent the wheelchair backward sliding.
D.The MP-A1 motor system is lightweight and easy to install. It can be fit on essentially any make and type of wheelchair, including folding, tilt-in space, one-arm drive and standing.

MP-A1  is a complete  kit  contains all the necessary parts . The battery is built inside . No need to purchase . 

Wheel size: 8 inch
Material: aluminum alloy
Voltage: 24V lithium battery
Power: 250W
Operating current: less than 3A
Mileage: 20kmControl system: the use of intelligent self-help force system.
Backward self-locking motor function.
Speed: I: 2.5-5km/h; II:2.5-8km/h
Installation: suitable for ordinary wheelchairs, easy to assemble and disassemble.

 MP-A1 is well packed and protected by EPS box &  strong paper box .