Communication: UART Applicable handlebar size: 22.2mm/25.4mm/28.6mm/31.8mm Voltage: 24V/36V/48V/60V (24V-60V adjustable) USB charging: 5V/500mA Due to different batches there may be differences in the appearance color and printing of the product which does not affect its use Color: Black Material: plastic Specification: SM 5+2PIN Package Contents: 1 x 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 measurement allowed error is +/- 1-3cm.