Left hand thumb throttle or right hand trigger throttle for adjusting the speed.
This is a super nice accessory for e-bike or scooter, it is easily wired to any scooter or e-bike.
If your not hard wiring this in and you would like certain ends put on the wires in a certain spot to make the install easier.
With this accelerator throttle, you can control the speed of your electric bicycle and scooters easily.
Left hand and right hand models for choosing.