Description: Reinstall the battery until the blue light flashes to indicate the cadence mode if the old battery is run out of. And the working time reaches for about 400 hours, it can be used continuously a year if you ride 1 hour a day. Rotate the crank and search for the sensor using ANT+ or bluetooth-compatible device. Please remove the battery insulation film in the cadence before connecting the cadence sensor. This kind of cycling cadence sensor weighs only 10g, small and lightweight, perfect for spin class or use with multiple bikes. The water protection is IP67 waterproof, enjoying your cycling every day in all weather and not easy to make trouble for you. This kind of cycling cadence sensor can track and capture the real-time cycling speed and cadence data on your bike computer. This cycling cadence speedometer can be connected to smartphone cycling Apps by bluetooth-compatible function, saving time and strength for you. Specification: Material: electronic component. Color: black. Size: 59*35*13.5mm. Working time: about 400h. Waterproof: IP67. Wireless protocol: ANT+, bluetooth-compatible. Note: Due to the light and screen difference, the item\'s color may be slightly different from the pictures. Please allow a slight deviation for the measurement data and make sure you do not mind before ordering. Package included: 1x cadence sensor.