Specifications: Material: Aluminium Alloy + Rubber Color: Golden, Silver, Red, Blue (optional) Package Weight: approx. 320g Type: Throttle with digital display and lock Wire Length: approx. 2m / 78.7" Install Hole Diameter: approx. 2.3cm / 0.9" Working Voltage: Throttle DC1-4.2V, battery level indicator, 12-84v automatically identitify Conpatible With: Suitable for 12V-99V Electric Bicycle Fitment: Fit for 22.2mm diameter handle Five Wires: Yellow is for power positive Blue is for for controller power positive or electric switch, or key lock Three throttle wires: Red is for throttle positive + 5v Green is for twist throttle signal wire Black is for throttle negative Package Included: 2 x Handlebars (1pc right handle, 1pc left handle grip) 1 x 2m Line 2 x Keys Note: 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. Common sense for battery voltage Different battery materials, new/old condition of battery, and different controller data make battery voltage reflects differently. Please check your battery voltage data according to your battery. The maximum voltage indicates full charge. The low voltage indicates that the battery is exhausted. 12V ebike max voltage 12V, min voltage 9V 24V ebike max voltage 29V, min voltage 21V 36V ebike max voltage 42V, min voltage 29V 48V ebike max voltage 54V, min voltage 39V 60V ebike max voltage 72V, min voltage 49V 72V ebike max voltage 84V, min voltage 60V