Features117A Brushless Motor Controller: Can provide stable speed and sensitive braking and direction change control. 2Waterproof Function: To ensure maximum durability in any weather conditions, not afraid of wind and rain. 3Safety Protection: High performance wire and waterproof interface are durable, ensuring long term use and low failure rate. 4Easy to Install and Use: Equipped with wiring identification instructions, usually suitable for 250W brushless motors. 5Good Heat Dissipation Function: Shell is made of aluminum alloy with groove design, which can protect the internal circuit and avoid thermal overload.SpecificationItem Type: Sine Wave ControllerColor: As Picture ShownMaterial: Aluminum AlloyController Type: Sine Wave ControllerConnector Type: Waterproof ConnectorMaximum Current: 171ASpeed Setting: 1-4.2VRated Current: 8ABrake Input: Low LevelWeight: Approx.320g/11.3ozController Box Size: Approx.93x61x35mm/3.7x2.4x1.4inController Wire Color Definition:1. Black Long Wire: Motor Wire2. Red and Black Single Short Wires: Power Cord3. Black Long Wire (Fine Hole): One for Four, One for Five (9 Cores)4. Black Line and Red Head: Light Line5. Black Line and Yellow Head: PAS Speed Assist Sensor LinePackage List1 x Controller1 x Manual