Specification: Item Type: Thumb Throttle Speed Control Material: Plastic Model :S Series (5V-99V Automatic Identification Of Electric Vehicle Voltage) Application: For Electric Bike, Electric Scooter Product Size: Wire length: Approx.160cm/63.0in Suitable Handlebar Diameter: Approx.2.3cm/0.9in. Weight: Approx.83g/2.9oz Efficiency: ≥98% Hall Scale: Linear Hall Working Voltage: Twist Grip DC0.8V-4.2V Matters Needing Attention Please Pay Attention To The Wiring Sequence When Non-Professional Personnel Install, Do Not Connect The Wrong Line, Otherwise It Is Easy To Cause Hall Burn Basic Parameters :(According To Different Battery Materials, Different Old And New Status, Different Batches, The Voltage Values Will Be Different, Please Test A Few Times To Get Your Own Electric Vehicle Battery Parameters,) For 12V Electric Bike, Max Voltage Is About 12.6V, Mini Is About 9V Or Above, For 24V Electric Bike, Max Voltage Is About 29.4V, Mini Is About 21V Or Above, For 36V Electric Bike, Max Voltage Is About 42V, Mini Is About 29V Or Above, For 48V Electric Bike, Max Voltage Is About 54.6V/58.8V, Mini Is About 40V Or Above, For 60V Electric Bike, Max Voltage Is About 72V, Mini Is About 49V Or Above, For 72V Electric Bike, Max Voltage Is About 84V, Mini Is About 60V, For Other Electric Bike With Above Voltage There Should Be A Voltmeter Installed. Package List: 1 x Thumb Throttle Speed Control