How to Use: Installation method: 3 wires for twist grip, red is the positive pole, black is the negative pole, green is the grip signal wire, the separate yellow wire is the positive pole of the power supply. Specification: Item Type: Thumb Throttle Grip Material: Plastic Model:S Series Application: For Electric Bike, Electric Scooter Product Size: Suitable Handlebar Diameter: Approx.2.3cm/0.9in. Weight: Approx.314g/11.1oz Efficiency: ≥98% Hall Scale: Linear Hall Display: Without Working Voltage: Twist Grip: DC0.8V 4.2V Power Adaptive: Regardless Of Sealed Or Lithium Battery, Regardless Of Voltage, Can Automatically Identify (12V, 24V,36V,48V,60V,72V Electric Vehicles Can Be Directly Used, Part Of 84V Electric Vehicles Can Also Be Used) 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 Or Above, For Other Electric Bike With Above Voltage There Should Be A Voltmeter Installed. Package List: 1 x Handlebar Grip 1 x Twist Grip 2 x Keys Note: 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 cable burn.