1Multifunctional: This electric wheelchair joystick controller is multifunctional with ramp parking, ramp anti skid, over speed protection, short circuit protection, battery output protection and other functions . 2Fast Heat Dissipation: The lower case of this wheelchair joystick controller is made of all aluminum material and equipped with heat dissipation nests, which is fast heat dissipation, anti bumping and long service life . 3Good Compatibility: This electric wheelchair controller can be adapted to major wheelchair brands, and is easy to install, easily and directly loaded and unloaded, compatible with most brands of electric wheelchairs, important and practical accessory . 4High Sensitivity: To ensure stable starting and high sensitivity, this electric wheel chair controller replacement will provide flexible control of speed and direction . 5Good Performance: This wheelchair joystick controller replacement has good performance, with stable and flexible acceleration and deceleration, and fluent speed change . There is no sense of sudden stop .