Features: The controller shell is made of aluminium alloy, which can the inner circuit and good for heat dissipation to avoid thermal overloading. This item is a brushless motor controller, it can provide steady speed, silent working, sensitive control of braking and direction changes. More efficient and more energy-saving. It can automatically identify the phrase angle and rated voltage of electric bike. The wires and interfaces are , and ensure low malfunction of long time use. Each interface has different color for your easy installation. Suitable for electric , scooter, etc. Specification: Material: Aluminium alloy Rated Power: 450W . Current: 22A Phrase Angle: 60à °/120à ° Size: Approx. 110 * 84 * 44mm / 4.33 * 3.31 * 1.73inch Cable Length: Approx. 15cm / 5.91inch Weight: Approx. 447g Options(Rated Voltage): 24V/36V; 36/48V; 48V/60V Under-Voltage : 24V/36V-20V/31V; 36/48V-31V/42V; 48V/60V-42V/52V Package List: 1 * Brushless Controller0522V0H0U3XZJUZHO-TJ07946wz749CZ-0138.459992019-05-21 23:30:54 PDTy111B07S226SWYB07S226SWY0DEFAULTDefault Template0522V0H0U3XZJUZHO-TJ07946wz749CZ-0129.95202019-05-21 23:30:54 PDTy111B07S226SWYB07S226SWY0DEFAULTDefault Template