1Touch button technology, human body induction MODE button, can automatically change the screen with light slide, the screen change function is the same as the line control. 2Wire control button technology, the watch base leads to the MODE button, ensuring that you can easily change the screen without releasing your hand while riding. 3Anti interference design, in a complex electromagnetic environment, such as mobile phones, computers, etc., the computer stops receiving signals and suspends work. 4Automatic light control LED backlight technology, automatically sense the intensity of the external environment light, when the external light is weak, the backlight function is turned on, press any key to turn on the backlight for 5 seconds, when the external light is strong, the backlight function will automatically turn off, this function can reduce unnecessary The backlight consumes power and prolongs the use time. 5Backlight is always on manually control design, finger touch the MODE touch key for 10 seconds, you can set the backlight to be always on, if you need to turn off the backlight, then touch the MODE touch key for 10 seconds, which is convenient for long term data viewing when riding at night. 6Automatic wake up design, the computer has a internal ball, shake it, and you can hear the rolling sound of the ball. When the ball moves, the computer automatically enters the working state. If it does not move for a long time, it will enter the standby state, effectively extending the battery life. Item Type: Wireless Touch Screen Bicycle Stopwatch Color: Black Material: Engineering Plastic Weight: Approx.115g/4.1oz Battery: 2 x CR2032 240mah (supporting Battery) Display Size: Approx. 5.3x3.8cm/2.1x1.5in Head Size: Approx. 7.4x4.4cm/2.9x1.7in Features: Tool Free Installation, Large Screen Display, Free Switching Between Kilometers and Miles, Waterproof Life, Temperature Display Function, Low Battery Display, Stopwatch Functions: Driving Speed, Total Driving Distance, Single Driving Distance, Maximum Driving Speed, Average Speed, Accumulated Driving Time, Single Driving Time, Single Travel Time, Clock, Stopwatch, Measuring External Environment Temperature Function, Driving Time Positive Meter, Countdown, Mileage Countdown, Comparison Reminder, Speeding Reminder, Fueling Reminder, Driving Data Sampling Function, Low Battery Display 1 x Manual 2 x Battery 6 x Cable Tie 1 x SensorMagnet 1 x Stopwatch Base 1 x Wireless Sensor 1 xStopwatch Power consumption is relatively large when the screen is turned on for a long time. Please prepare a few more batteries in advance.