Bicycle Components & Accessories
eejinwen Electric Bicycle Thumb Throttle 300X Speed Control Finger Throttle 24V 36V 48V 72V Right/Left Sides for E-Bicycle Accelerator
Type: 300X Working voltage (V): 5V Output voltage (V): 0.8-4.2V Turning angle (°): 0-70 Application: 24V 36V 48V 72V
https://www.bizrate.co.uk/bicyclecomponents_accessories/eejinwen-electric-bicycle-thumb-throttle-oid40495998822.html