1Easy to Install: 17A controller adopts high quality wire, durable, convenient and practical. 2Improve Efficiency: Use aluminum alloy shell, good heat dissipation performance. 3Applicable Model: Suitable for 250W and 350W motors, only applicable for KT series products. 4Sine Wave Controller: Can avoid the sudden change of current during commutation, with low noise and stable output. 5Simple Operation: Connect the corresponding connector to the corresponding product according to the controller interface description in the manual. Item Type: 36V/48V 17A Controller Color: As Pictures Shown Material: Aluminum Alloy Weight: Approx.308g/10.9oz Controller Type: Sine Wave Controller Maximum Current: 171A Rated Voltage: DC 36V/48V Speed Setting: 1-4.2V Rated Current: 8A Brake Input: Low Level Low Voltage Protection: DC 30/400.5V Controller Wire Color Connector Description: 1. Black Long Wire: Motor Wire 2. Red and Black Single Big Wire: Power Cord 3. Red, Blue, Black, Green and Yellow Five Wire Port: Instrument Wire 4. Red and Black Wires (Two Connectors): Light Wires 5. Red and Blue Wires (Two Connectors): Power off Brake Lever Wire 6. Red and Black Lines: Thumb Throttle Wire 7. Brown Black Yellow Line: PAS Speed Assist Sensor Wire 1 x Controller 1 x Manual 1. It needs to be used in conjunction with products that are consistent with the communication protocol.2. for KT controller is only suitable for KT series products.