Blusmart Multi Function Wireless Waterproof LCD Bike Computer Odometer Speedometer with LCD Backlight

Anti Signal Interference: It won't interfere other wireless & electronics devices, wireless ranged less than 60 cm, accurate data result.
Multi Function: Speed comparing, Average, Maximum, Relative, Riding time, Riding distance, Measurements, Auto ON/Off, Scanning, Comfortable and User friendly.
Auto Sleep/Wake: Auto standby within 300 seconds during inactive use, CLK Data will stay, it will start up if any button is press and detect any movement.
Auto Detect: There is a small ball inside that will create movement to awake & Auto Start-up, you can hear it when you shake the device, but it¡®s normal.
Smooth Operation: Two buttons only for multiple modes, M/H or KM/H modes can be choose, convenient and easy to use.