Bicycle Wireless Code Meter Mountain Road Bike Multifunctional Speedometer Features The 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. Parameter Weight : about 30g(Speedometer) Size : 75 x 50 x 15mm Package includes 1x computer unit 1x sensor 1x foamslice 2x battery 3x stickers 1x mount 1x magnet The More You Buy, the Better the Deal To Better Fit You,please Do Measure the Size and Compare to the Size Chart Before Placing Order. Halloweenhalloween Decorationshalloween Decorhalloween Decorations Indoorhalloween Decorations Outdoorhalloween Home Decoroutdoor Halloween Decorationshalloween Decorations Clearancedecorationhalloween Christmaschristmas Decorations Before Christmaschristmas Decorations Clearancethe Before Christmasholidaynightmare Before Christmas Popchristmas Clearance AFTER SALE SERVICE: 30 Days after sales service and exchange, reply you within 24 hours to solve your problem.