E-Bike 108X Left Thumb Throttle Speed Control 3 Pin, L Waterproof Plug). "Attention: Waterproof connector can't connect to the controller directly,need a 1 to 4 Bus-cable. Puduct Parameter: Type:108X-L Thumb Throttle 108X-R Thumb Throttle Voltage:24V,36V,48V,60V,72V Wire length:180cm/70 inch(SM) 25cm/9.8 inch(WP) Plug:3 Pin Connector Applicable Handlebar Diameter: Approx. 22.5 mm / 0.88 inch Installation Position: Right / Left Weight: 65G " Voltage Compatible?Adapt to 12V-72V electric bike or electric scooter controller?is a high-quality cycling accessories Size Compatible?108X thumb throttle compatible with most electric bike with ?22.5 mm handlebar?most bicycle electric for adults?electric mountain bike?folding bike and some electric scooter can be used. Signal Line Definition?The connector is 3pin(SM-3Y). There are three wires in total, namely red, black, and blue. Red is the positive pole, black is the negative pole, and blue is the signal wire.The same is true for waterproof plug Line length:The SM Plug cable length is 180 cm (70 inch) ,Waterproof Plug cable length is 25cm(9.8 inch), Please pay attention(Attention) waterproof connector can't connect to the controller directly,need a 1 to 4 Bus-cable. We are committed to creating a good shopping experience. Your satisfaction is our ultimate goal. We can also accept DIY custom service, if you have related needs, you can leave me a message. Any other questions, free to contact us. We will reply you within 24 hours.