can be used for electric bike, scooter, , 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 : light high/low gear reverse zero-non zero start THROTTLE OR PAS ON-OFF SOFT or hard start speed limit switch ON-OFF When wiring throttle --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 yellow throttle yellow -connect with controller power lock red Default setting wire length 1.8m universal and standard install hole diameter 22.5mm Style:60V Colour:black Material:Composite material Package Contents: 1 * Electric bicycle throttle handle Only the above package content, other products are not included. Note: Light 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.