Features： 1、Heat 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. 2、Provide 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. 3、Waterproof 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. 4、Easy 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. 5、Applicable 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. Specification： Item Type: Sine Wave Controller Color: As Picture Shown Material: Aluminum Alloy Weight: Approx. 420g / 14.8oz Controller Box Size: Approx. 125x66x39mm / 4.9x2.6x1.5in Controller Type: Sine Wave Controller Connector Type: Waterproof Connector Maximum Current: 25±1A Speed Setting: 1-4.2V Rated Current: 12A Brake Input: Low Level Applicable Motor: Usually 750W Motor Controller Wire Color Definition: 1. Black Long Wire: Motor Wire 2. Red and Black Single Big Wire: Power Cord 3. Black Long Wire (Fine Hole): One for Four/One for Five (9 Cores) 4. Black Line and Red Head: Light Line 5. Black Wire and Yellow Head: Power Assist Sensor Wire Package List： 1 x Controller 1 x Manual