The shell of the controller is made of aluminum alloy with a groove design, which can the internal circuit and have good heat dissipation to avoid thermal overload. This item is a brushless motor controller provides stable speed and sensitive control of and direction changes. The controller can work quietly. The wires and interfaces are rugged and durable, ensuring long-term use with fewer failures. The interface has an instruction label for easy installation. Suitable for electric bicycles, scooters, etc. Features: 1. Low-voltage overcurrent protection 2. E-ABS/High/Low brake 3. Regenerative (with on/off switch) 4. control 5. Backward/backward (usually 50% of the forward speed, the can be set according to customer requirements) 6. 3 speed (we usually set the standard 3 speed as 80%-100%-110%, when you 't use the switch, the speed is 100%) specification: Working voltage: 48-60V Whether waterproof: yes Rated power: 1000W Low voltage cut-off: 41/51 V0.5V Brake level: high/low level Phase : 60/120 degree universal Waterproof level: splash water Suitable for: electric bicycles, scooters, etc. Colour:Black Material:Aluminum alloy Package Contents: 1 * Dual mode brushless controller Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.