Features： 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: The 34V/48V 500W motor brushless controller can provide stable speed and sensitive control of braking and direction changes. 4、Simple Installation: The electric bicycle brushless motor controller is easy to install and use. 5、LCD Display Meter: It is backlit and can clearly display the status and data, suitable for 22.5mm / 0.9in handlebars. Specification： Item Type: Motor Controller with LCD Display Panel Material: Aluminium Alloy Product Color: As Pictures Shown Controller Box Length: Approx. 14cm / 5.5in Controller Box Width: Approx. 8.5cm / 3.3in Controller Box Height: Approx. 4cm / 1.6in Product Weight: Approx. 717g / 25.3oz Power: 500W Current Limit: 28A Package List： 1 x Controller 1 x LCD Display Meter  1 x Manual