As the combination of convenience and science beauty, it is wonderful companion for cyclist. The bright auto screen is large for clear data to provide a good view for cyclist; it is IPX6 waterproof so that you can ride with it in rainy day. The auto backlight is smart to turn on or off when sunrise or sunset. To monitor your riding fun instantly with this device, to track your speed, distance, calories burnt, etc.. Features: Display speed, average speed, max speed, time, distance, temperature and altitude, trip time, date, etc. in data instantly. Upload the data to your computer and then to www.igpsport.com or www.strava.com for analysis. Automatically bright screen turn on/off when sunrise or sunset. IPX6 water proof body allows for rainy day riding. Easy to install onto the handlebar with the mount and O-rings provided. Note: The description "Recording: Flashing means pause, lighting up means recording" is misprinted. It should be altered to "Recording: Flashing means recording, lighting up means pause". Please read the user manual carefully before operation. Functions: SPD: Current speed AVS: Average Speed DST: Trip Distance ALT: Altitude ODO: Odometer MXS: Max Speed TEM: Temperature CAL: Calories Time Trip Time Date Specifications: Model: iGS20E Color: Black Material: PC + ABS GPS: High sensitive GPS Display: Dot-metric screen Screen size: 30 * 38mm / 1.2 * 1.5in Backlight: Auto Temperature: -10~50℃ Antena: Built-in Waterproof: IPX6 Memory: >90h data Battery: Rechargeable Lithium-ion Working time: 25h (No Backlight) Charging: Standard Micro USB Barometric altimeter: Yes Computer dimension: 46 * 71 * 22mm / 1.8 * 2.8 * 0.9in Package size: 152 * 110 * 30mm / 6.0 * 4.3 * 1.2in Package weight: 153g / 5.4oz Package List: 1 * iGS20E Computer 1 * Micro USB Cable 2 * Bike Mount 4 * O-ring 1 * User Manual