Specification: Item type: Electric Scooters Throttle Grip Material: plastic Weight: Approx. 182g Model: S series (5V-99V automatically recognizes the voltage of electric scooter) Efficiency: 98% Hall grade: linear for Hall, high quality rubber, imported LED digital display light Working voltage: Throttle Grip DC0.8V-4.2V Voltage digital display throttle grip instruction manual Matters needing attention For non-professionals, please pay attention to the line sequence, and do not connect the wrong line, otherwise it will easily cause the burn. basic parameters: (according to different battery materials, different old and new, different batches, the voltage v number will be different, please test a few times, you can get your own electric scooter battery parameters,) 12V electric scooter, the highest voltage is about 12.6V or slightly higher, the lowest is about 9V or slightly higher 24V electric scooter, the highest voltage is about 29.4V, the lowest is about 21V or a little higher 36V electric scooter, the highest voltage is about 42V, the lowest is about 29V or a little higher 48V electric scooter, the highest voltage is about 54.6V or 58.8V, the lowest is about 39V or a little higher 60V electric scooter, the highest voltage is about 72V, the lowest is about 49V or a little higher 72V electric scooter, the highest voltage is about 84V or a little higher, the lowest is about 60V Higher voltage electric scooters are already equipped with voltmeters. Package List: 1 x Electric Scooters Throttle Grip 2 x Key Note: The default line length is 0.4m/1.3ft, and the digital display is 12v to 84v universal.