Feature:1. Good Heat Dissipation: The controller shell is made of high quality metal with groove design, good heat dissipation function, can protect the internal circuit and avoid thermal overload.2. Brushless Motor Controller: The brushless motor controller can provide stable speed and sensitive braking and direction change control, make your ride smoother and safer.3. Waterproof Function: The waterproof function ensures maximum durability in any weather conditions, and the high performance wires and waterproof interfaces are durable, ensuring low failure rate for long term use.4. Current and Voltage: Maximum current is 151A, rated voltage is DC 36V/48V, speed setting is 14.2V, rated current is 7A, low voltage protection is DC 30/400.5V.5. Applicable Motor: The brushless motor controller is easy to install and use, equipped with wiring identification instructions, and is usually suitable for 250W brushless motors.Specification:Item Type: ControllerMaterial: Aluminum AlloyController Box Size: Approx. 82x52x31mm/3.2x2.0x1.2inController Type: Sine Wave ControllerConnector Type: Waterproof ConnectorMaximum Current: 151ARated Voltage: DC 36V/48VSpeed Setting: 1-4.2VRated Current: 7ABrake Input: Low LevelLow Voltage Protection: DC 30/400.5VController Wire Color Definition:1. Black Long Wire: motor wire2. Red, Black Single Short Wire: power wire3. Black Long Line (Fine Hole): one to four / one to five (9 cores)4. Black Line Red Head: light wire5. Black Line Yellow Head: PAS wire.Package List:1 x Controller1 x Manual Note:It should be compatible with products with the same communication protocol, only suitable for KT series products. The motor does not need a brand, and the joint matching can be used.