TESECU LED Bike Light USB Rear Bicycle Light Rechargeable Bike Tail Light and Front Light Set Cycle Headlight with Bicycle Speedometer Odometer Fits All Mountain Road Bike

Tesecu is committed to build the highest quality lighting systems, because we understand the importance of proper lighting for every cyclist's visibility and safety. The Steps for Setting Up The Speedometer Step 1: Set the unit --- Long press the Button "+" and "-“ together, then press the Button "-" to transform between km/h and m/h. Step 2: Set the speedometer --- Press the Button"+", then the number "208" blinks on the display, it means the default wheel size (the circumference of just one wheel), the unit is CM. You could press the button"-" to change the wheel size from 10-315 cm. Step 3: Set the odometer --- Press the Button"+", then press the button"-" to adjust odometer. Step 4: Press the Button"+". Done. Other Product Features: - High sensing electronic speedometer and odometer - Intelligent battery power display - 120 high decibel horn - Large-screen display, anti-glare design - Automatic, fully charged cut-off system - Smart charging ensures longer battery life