Feature: 1. Material: The controller housing is made of high quality metal with groove design, which is durable. 2. Protection Function: Due to the good heat dissipation function of the controller, the internal circuit can be protected to avoid thermal overload. 3. Brushless Motor Controller: It can provide stable speed and sensitive control of braking and direction changes. 4. Simple Installation: The 34V/48V 1000W electric bicycle motor brushless controller is easy to install and use. 5. Application: The LCD display thumb shifter is suitable for 22.5mm / 0.9in handlebars. Specification: Item Type: Motor Controller with LCD Shifter Material: Aluminium Alloy Product Color: As Pictures Shown Controller Box Length: Approx. 18.1cm / 7.1in Controller Box Width: Approx. 10cm / 3.9in Controller Box Height: Approx. 3cm / 1.2in Product Weight: Approx. 875g / 30.9oz Voltage: 36V/48V universal Power: 1000W Current Limit: 38A . Package List: 1 x Controller1 x LCD Display Thumb Shifter 1 x Manual