UNIVERSAL APPLICATION:The accelerator is specially designed for electric scooters, suitable for most scooter models.The thumb is designed with raised stripe for easy acceleration and very easy to use EASY TO CONTROL:Widened and thick thumbstick, more , to use, non slip and waterproof design, easy to control. WATERPROOF DESIGN: With waterproof connector, compact and design, easy to install and use. Can be used on . UNIVERSAL: compatible with most electric bikes, electric bikes, mountain bikes, folding bike scooter. Scooter Parts Easy To Install And Remove: Electric Scooter Throttle Aclerator Is Easy To Install And Remove, Practical And Easy To Operate. Color: black + red Material: plastic Package Contents: 2 x Finger brake(black + red) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.