Bicycle Wireless Code Meter Mountain Road Bike Multifunctional SpeedometerFeaturesThe speedometer has many functions, including a timer, a thermometer, an alarm clock, a maximum speed, an average speed, and a total of 17 functions.IP44 waterproof rating, it can maintain normal operation regardless of sunny or rainy days.There are two modes: night and day. During the day, the brightness of the screen is reduced to save power, and the screen is lit at night so that you can see the digital display clearly.Small and lightweight design, easy to carry, can be used for long-distance riding and daily training, not burdening your riding.If not used for 300 seconds, the speedometer will automatically enter the dormant state to save power.ParameterWeight : about 30g(Speedometer)Size : 75 x 50 x 15mmPackage includes1x computer unit1x sensor1x foamslice2x battery3x stickers1x mount1x magnet