1、Fitment: The extension cable is a replacement for Bafang P850C display with 4 pin, please check your bike model before ordering. 2、Waterproof: The cable and the switch are made of high quality PVC material, which is waterproof ensures durability and longevity. 3、Function: The extension cord comes with a control button that makes it easier to control the electric bike's motor dashboard and enhance your driving experience. 4、Precision Craft: This bicycle display cable is manufactured in strict accordance with standard requirements, high performance, long service life. 5、Portable: This electric bicycle display is small size and lightweight, won't burden your electric bike, takes up a small space, easy to carry and store.