Specification:  Material: Plastic PA66 GF20;  Cable Length: Approx. 160cm / 62.9inch;  Battery Indicator Voltage: 24V / 36V / 48V;  Adjust speed Working Voltage: 5V;  Adjust speed Output Voltage: 0.8-4.3V;  Rotation angle: 0°---70°;  Operation temperature: -40℃ ~ +80℃;  Fitment: Fit for Handle bar is 22mm or 7/8 Inch Electric bicycle, Electric Scooter, MTV.     Function:  Battery Indicator(Green,Red,Yellow) +  Self-Lock (The Red Button) + Adjust Speed (The Black Button);  Green Light =High Power;  Yellow Light=Half Power;  Red Light=Empty Power;  Red ,Black and White wire--- Adjust speed;  Green wire----Positive (Battery Indicator;  Yellow and coffee wire---Self-Lock/Switch on or off;  Adjustable-Speed Button can be fit for this function,but your bike need to have this function.  Cruise / Low Gear / High Gear / Reversing Lamp switch / run at full speed Automatically / Handlebar Switch on or off / Low battery Keep working.     Note:  Do Not touch the Adjustable-Speed Button before installation, because if you touch the Adjustable-Speed Button, the inside springs may be taken out, this item can not be used.     Package Included:  1 X Handlebar with Battery Indicator.