Features1Heat Dissipation Function: The controller shell is made of high quality aluminum alloy with groove design. Due to its good heat dissipation function, it can protect the internal circuit and avoid thermal overload. 2Provide Stable Speed: The brushless motor sine wave controller can provide stable speed and sensitive braking and direction change control, providing you a good using experience. 3Waterproof Connectors: Fully waterproof connectors ensure maximum durability in any weather conditions. High performance wires and waterproof interfaces are durable, ensuring low failure rates for long term use. 4Easy Installations: The electric bicycle sine wave controller is easy to install and use, equipped with wiring identification instructions, and is usually suitable for 750W brushless motors. 5Applicable Model: Sine wave controller needs to be used in conjunction with products that are consistent with the communication protocol and is only compatible for KT series instrument products.SpecificationItem Type: Sine Wave ControllerColor: As Picture ShownMaterial: Aluminum AlloyWeight: Approx. 420g / 14.8ozController Box Size: Approx. 125x66x39mm / 4.9x2.6x1.5inController Type: Sine Wave ControllerConnector Type: Waterproof ConnectorMaximum Current: 251ASpeed Setting: 1-4.2VRated Current: 12ABrake Input: Low LevelApplicable Motor: Usually 750W MotorController Wire Color Definition:1. Black Long Wire: Motor Wire2. Red and Black Single Big Wire: Power Cord3. Black Long Wire (Fine Hole): One for Four/One for Five (9 Cores)4. Black Line and Red Head: Light Line5. Black Wire and Yellow Head: Power Assist Sensor WirePackage List1 x Controller1 x Manual