How to Use: Installation method: three rotating wires, red to the positive pole, black to the negative pole, green to the wire, separate yellow is the positive pole of the power supply. Specification: Item Type: Throttle Grip Handlebar Product Material: Plastic Weight: Approx. 300g/10.6oz Model: S Series Efficiency: ≥98% For Hall Level: Linear for Hall Working Voltage: Handbar DC 0.8V-4.2V Handlebar Diameter: Approx. 2.3cm/0.9in Power: Regardless of Lithium Battery, Water Battery, Dry Battery, Regardless of Voltage, Can Be Automatically Identified (12V, 24V, 36V, 48V, 60V, 72V Electric Vehicles Can Be Used Directly, and Some 84V Electric Vehicles Can Also Be Used) Basic Parameters: (Depending on the battery material, new and old, different batches, the number of voltages will be different, please test several times, you can get your own electric vehicle battery parameters) Voltmeters are already installed in higher voltage electric vehicles. Package List: 1 x Throttle Grips 1 x Handlebar 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 for hall and LED tube burn.