Specification: Item Type: Bicycle Modified Kit Product Material: Aluminum alloy and ABS plastic Weight: Approx. 785g / 27.69oz Product Size: Controller box Approx.120x65x40mm / 4.72x2.56x1.57in, instrument Approx.107x67mm/4.21x1.64in Controller Rated Voltage: 36V DC /48V DC Controller Rated Current:11A Controller Maximum Current: 22±1A Controller Speed Setting:1-4.2V Controller Brake Input: Low Level Controller Low Voltage Protection: DC 30/40±0.5V Applicable Motor Power: 500W Joint Type: Fully waterproof joint 1 To 2 lines Description: an end is connected to the controller, and the other ends are connected to the instrument and dial Controller Lne Definition: 1. Red and Black Single Cable: Power cable 2. Black Single Large Wire (9PIN) : Motor wire 3. Black Single Wire (9PIN) : 1 to 2 wire 4. Black Single Wire (3pin) : Power assist sensor wire LCD8H Instrument Function: Up button, switch button, down button, power assist sensor mark, battery capacity indicator, operation sign, single trip time, total travel time, battery voltage, brake display, 6km/h thrust assist, ride speed (metric), maximum speed, average speed, travel distance, total distance, backlight and headlight, ambient celsius, aAmbient fahrenheit Package List: 1 x Controller1 x Instrument 1x Instrument Mounting Frame 4 x Instrument Mounting Frame Gasket 2 x Instrument Mounting Frame Screw 1 x Accelerator Thumb Shifter 1 x Booster Sensor Gasket 1 x Instrument Specification 1 x 1 To 2 Connecting Line 1 x Controller Wiring Specification Note: The modification kit must be fully waterproof.