7 Wires: Yellow is for power positive, usually connect with battery power + 24V 36V 48V 3 throttle wires : Red is for throttle positive + 5V Green is for twist throttle signal wire Black is for throttle negative The other three white blue and brown is for gears 3, please make sure your controller has 3 gears wire White is for high speed Blue is for middle speed shared line Brown is for low speed Specifications Material Aluminium Alloy + Rubber Color Silver Package Weight approx. 285g Wire Length approx. 2m / 78.7" Type 3 gears switch, high speed, middle speed, low speed (Adjust the speed of electric car, need controller to support) Compatible With Suitable for 12V-99V Electric Bicycle Fitment Fit for 22.2mm diameter handle Working Voltage Throttle DC0.8-4.2V, battery level indicator, 12-84V automatically identify. Application for any battery such as lithium battery , lead-acid battery Compatible With Universal throttle for electric bike, scooter, tricycle, and other electric vehicle Package Included 2 x Handlebars (1pc right handle, 1pc left handle grip); 1 x 2m Line Note 1. Please notice that if your electric vehicle's controller doesn't support speed regulation, then this speed control switch has no effect. 2. When installing the non professionals, please pay attention to the line order, can not be connected to the wrong line, otherwise it is very easy to cause the burning of Holzer and LED tube. Note 1. Please notice that if your electric vehicle's controller doesn't support speed regulation, then this speed control switch has no effect. 2. When installing the non professionals, please pay attention to the line order, can not be connected to the wrong line, otherwise it is very easy to cause the burning of Holzer and LED tube.