YSONG LED Bicycle Lights USB Front and Rear Rechargeable Bicycle Headlight Tail Lights, Bicycle Speedometer, Odometer Waterproof Front Lights, Suitable for All Mountain and Road Bikes

Set speedometer Step Step 1: Set the unit --- Long press the buttons "+" and "-", then press the button "-" to switch between km/h and m/h. Step 2: Set the speedometer---Press the button "+", then the number "208" flashes on the display, which means the default wheel size (only one wheel's circumference), the unit is CM. You can press the button "-" to change the track to 10-315 cm. Step 3: Set the odometer --- Press the button "+", then press the button "-" to adjust the odometer. Step 4: Press the button" -High sensitivity electronic speedometer and odometer -Smart battery level display -120 high decibel horn -Large screen display, anti-glare design -Automatic, fully charged cut-off system -Smart charging ensures longer battery life packing list 1 * Bicycle headlight 1 * Bicycle taillight 2 * Silicone mounting tape 2 * USB cable 1 *Code table data receiver 1 *Data sensor of code table 2 *Sensor rubber feet 1 *Speaker controller 4*Nylon belt 1 *User Manual how to install: 1. Loosen the magnetic head by hand and install it on the spokes. 2. Affix the rubber sticker to the receiver. 3. Install the inductor on the front fork opposite the brake. 4. The alignment of the head between the two sensors must not exceed 3mm. specification: Headlight size: 105*57*41mm Shell color: blue + black Light source: T6 Brightness: 350LM Mode: st