Features 1、Brushless motor controller, stable speed, sensitive to braking and steering control, working smoothly and quietly. 2、The controller shell is made of aluminum alloy, which can protect the internal circuit, have good heat dissipation and avoid thermal overload. 3、The grip is made of soft rubber material for a more comfortable grip, and the hands will not be tired after long‑term cycling. 4、Widely used in various applicable models of electric bicycles, electric tricycles and electric scooters. 5、Power display handlebar, with high performance controller, easy to install and use. Item Type: E‑Bike Controller Set Material: Rubber + Aluminum Alloy Color: As Picture Shown. Weight: Approx. 544.0g/19.2oz How to use: 1. A set of black wires corresponds to the negative ground wire of the handle, green corresponds to the signal output of the handle, and red corresponds to the 5v positive handle 2. The other blue line corresponds to the display line, and the two yellow line groups correspond to the lock output switch 3. The other one corresponds to the positive input of the battery, and the other yellow wire is empty. Connect the corresponding wire to the corresponding plug-in according to the actual function. Package List 1 x E‑Bike Controller 1 Pair x Handlebar