Description: This wireless bicycle computer designed with multi functions including tracking average speed, , riding time, travel distance, clock, auto wake-up and etc. IPX6 waterproof large-size LCD with day & night backlight which allow you easy viewing during dark hours by pressing two buttons in the same time Easy to mount and operate - simple installation that only takes a few minutes and access all measurements by only two buttons Automatically read cyclic data, with 7-day memory and automatic power on/off function The screen will go into a standby sleep mode if there is no speed inputing in 300 seconds Specification: Size: 6x4.4x1.5cm/2.4x1.7x0.59 inch Color: Black Backlight: Green/White Package Includes: 1 Piece Cycle computer 1 Piece Bracket 1 Piece Bracket Seat, 1 Piece magnet 1 Piece Wireless transmitter 1 Piece Wired sensor 1 Piece Rubber ring 1 Piece Rubber slice Lots Zip Ties 1 English Instruction Book Note: 1. Remove the insulation sheet in the sensor and computer 2. Check distance between magnet and sensor, it should be controlled ≤ 3 mm 3. Let the sensor's front side(with words“SENSOR”) towards magnet 4. The device rattling in engaging that it is normal phenomenon because of the design of wireless automatic function