Features： 1、This is a general-use controller, most e-bike/scooter controllers can be replaced by it. 2、This controller maybe different with original, buyer should make sure capable to handle it before use it. 3、The red and black cable link up the battery, and the other two link up the motor, and there are introductions for others. 4、This product is suitable for electrombile and other electric bicycle. 5、Great accessory for electric bicycles. Specification： Features: This is a general-use controller, most e-bike/scooter controllers can be replaced by it. This controller maybe different with original, buyer should make sure capable to handle it before use it. The red and black cable link up the battery, and the other two link up the motor, and there are introductions for others. This product is suitable for electrombile and other electric bicycle. Great accessory for electric bicycles. Specifications: and High Quality Material: Aluminum Alloy Voltage: 24V Speed Governing: 1-4V Power: 250W Brake Crank: Mechanical Normally Open Suitable for Electric Bicycle Weight: Approx. 140g Packing List: 1 x Electric Bicycle Controller Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List：