Specification:Item Type: Lithium Battery Modification 15A Controller LED-S810 Display KitMaterial: Aluminum Alloy + ABS PlasticColor: As Pictures ShownWeight: Approx. 509g / 18.0ozProduct Size: Controller Box: Approx. 82x52x30mm / 3.2x2.0x1.2inController Rated Voltage: DC 36V/48VController Maximum Current: 15AController Speed Setting: 1-4.2VController Brake Input: Low LevelBooster: 1:5Applicable Motor Power: 250W, 350WConnector Type: Full Waterproof ConnectorController Line Definition:1. Red, black single wire: power wire2. Black single large wire (9pin): motor wire3. Black single wire (9pin): 1 to 2 wire4. Black single wire (3pin): power assist sensor wire5. Black single wire (2pin): light wireHow to Use:Controller Description: The wire color definition interface on the controller can be connected to the socket of the accessory to realize the function. For the specific operation, please refer to the wiring diagram and manual.Package List:1 x Controller1 x Display1 x Thumb Throttle1 Assist Sensor1 x Controller Wiring Manual1 x 1 to 2 Connecting LineNote:1. Modification kits must be fully waterproof kits.2. Please allow 1‑3mm error due to manual measurement. Thanks for your understanding.