XINJI LED Bike Light Set with Speedometer, USB Rechargeable Bike Computer, Loud Bike Bell, Waterproof Odometer and Tail Light (Black);

How to change the km/h to mph?
The default is the metric system. Press MODE（+） and SET（-） key for 5 seconds at the same time, the system enters soft start, all settings are cleared. Now press the SET (-) button and the unit switches to m/h, then press MODE(+) button to confirm.