Features1Smart microcircuit, stable function: Automatic memory and updated every weekly, powerful microcircuit; more stable function more correct data; longer service life. 2Day & Night backlight: Green & White color on the odometer display to distinguish between day and night. Please note the slight rattle sound from device is normal appearance, which results from the design of wireless automatic function. 3Made of quality material with fine process, lightweight, portable, durable, waterproof, resistant to high and low temperature. The screen is luminous and clearly display the time, average speed, maximum speed, distance, etc. 4Daily waterproof: Do not put the product into water or get wet in the rain for a long time. Cover a plastic warp when there is a bad weather. 5Suitable for mountain bike, road bike.SpecificationItem type:Bike Wireless Odometer Material: PVCWeight: Approx. 91gColor: As picture shownTransmitting distance: maximum 60cm/23.6INSize: Approx. 6x4x5cm/2.4x1.6x2inScreen size: 1 inWaterproof grade: daily waterproofInstallation location: handlebarsDisplay five languages: English, German, French, Dutch, SpanishBattery: 2 x CR2032 batterySimple installation step settings:1. Install the battery (Please remove the battery converter before installation. The positive pole should be set up up).2. Reconfigure and match the computer to get the accurate results before you use it for the first time.3. Install brackets.4. Install sensors.5. Install magnets.6. Put the bike computer in the bracket.Note: The distance between the speed magnet, cadence, magnet and sensor.Package List1 x Bike Wireless Odometer1 x Bracket1 x Sensor1 xMagnet2 x Sponge mat1 x Rubber ring4 x Fixing band1 x Instruction