This Bafang DPC18 UART LCD display works with Bafang BBS01, BBS02 & BBSHD mid drive motors, and it is NOT compatible with all other motors. LCD Display: 3.5 inch HD screen enables easy reading of the data on it while riding. Automatic Backlight Display: This display will adjust brightness automatically which depending on the environment brightness in different situations. IPX5 Grade Waterproof, works fine in sprinkles to moderate rain environment, enjoy riding in any weather. Rated Voltage(DCV): 36/48/52V. Holder (mm):Ø 22.2/25.4/31.8. If you receive an item and are not satisfied, please contact me before returning it.