This display shows the electric vehicle current battery voltage.
There are 3 versions:
1). With key lock and thumb throttle
2). With key lock only
3). With thumb throttle only.
4) With on/off button switch and thumb throttle
This display mounting hole diameter is 22mm.
Different version has different connection, I will tell you the corrent connection after you order, or please ask me before you order, thanks a lot.