1. Display function - Speed display, display, battery indicator, fault prompt, total mileage, single mileage, headlight display, single driving time display. 2. Control and setting functions Power switch control, headlight switch control, 6Km/h inching control, wheel diameter setting, maximum speed setting, idle automatic setting, backlight brightness setting, voltage level setting Upgraded version with Bluetooth, Supports Connecting to Phone. Communication protocol: UART (please check whether it matches your E-Bike before placing an order) Working voltage: DC24V, 36V, 48V, 60V Due to different batches, there may be differences in product appearance, color, and printed text, which not affect the use. Type:SM5+2PIN Colour:Black Material:ABS Package Contents: 1 * LCD Display Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.