Feature:1. IMPROVED PERFORMANCE: Enhance your bike motor with the 250W lithium battery modification controller. Enjoy increased power and efficiency for a more exhilarating ride.2. DURABLE CONSTRUCTION: Made from high strength aluminum alloy and rubber materials, this controller ensures durability and long lasting performance. Ride with confidence on any terrain.3. OPTIMAL GUARD: The controller features an external case made of aluminium alloy. Thanks to its groove design, it possesses excellent heat dissipation abilities, protecting the internal circuit and preventing overheating and overload.4. LONG DURABILITY: With high performance wires and waterproof connectors, the controller is durable and able to withstand long term use. These powerful safety features ensure a low malfunction rate.5. HIGH CURRENT OUTPUT: With a current rating of 15A, this modification controller provides ample power for your bike motor. Enjoy smooth acceleration and improved overall performance.Specification:Item Type: Electric Bicycle ControllerMaterial: Aluminum Alloy, RubberMotor Power: 250WProduct Size: Controller: Approx. 85 x 50 x 30mm / 3.35 x 1.97 x 1.18inConnector Type: Motor Wire Waterproof Connector, Other Wire Ordinary ConnectorCurrent: 15ARated Voltage: DC 36V 48V.Package List:1 x Controller