【Multi-functions】The bike computer measures your cycling data such as average speed, max speed, and KM per hour, cycling time, and distance. Added new features like recording calorie statistics, temperature, etc. Small and portable, waterproof design, exactly what every serious cyclist or fitness enthusiast needs to know about these cycling accessories. 【Backlight Day and Night】Provides backlight for easy viewing during dark hours. The backlight turns on when you press the "SET" and "MODE" buttons simultaneously to turn on the backlight manually. The brightness is very clear and does not irritate the eyes, which is an effective feature for passing through tunnels or dark trails. 【IPX6】You might encounter bad weather like a rainstorm while cycling. The Hilceriy speedometer for bikes can completely travel in a rainstorm (According to multiple test results, large-scale contact with rainwater in a rainstorm may lead to incorrect temperature function, meaning the water temperature is measured instead of the air temperature, the rest of the functions work normally, the bike speedometer will not be damaged in this case). 【Automatic Wake-up Function】The bike computer enters standby mode when there is no signal input for 3 minutes. When you touch the screen of the bike speedometer or start cycling, the bike meter will automatically start and remember the values before standby, and can also record data again according to your needs.