can be used for electric bike, scooter, MTB, folding bike, TRICYCLE AND SO ON/. it has lock+switch, and battery level display ,with battery level and display and latching button ,functions you can use for :lighthigh/low gearreversezero-non zero startTHROTTLE OR PAS ON-OFFSOFT or hard startspeed limit switchEBS ON-OFFWhen wiringthrottle --red +white +blue -this is throttle function wire, connect with controller red white black,ellow+green ,this is throttle power lock wire .connect with controller power lock wire (red yellow)throttle green- connect with controller yellowthrottle yellow -connect with controller power lock redDefault setting wire length 1.8muniversal and standard install hole diameter 22.5mmStyle:48VColour:blackMaterial:Composite materialPackage Contents:1 * Electric bicycle throttle handleOnly the above package content, other products are not included.Note: Light shooting 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.