Features:  Training function: Lap, Heart rate warning, Power warning.  Customized pages number: 30 pages  Displayed data in App: 37 sorts of data; 14 analysis charts.  Displayed data in bike computer: 9 classes (Power, Cadence,Speed, Heart rate, Slope, Distance, Altitude, Time, Lap); 37 sorts (Average data,Maximum data, etc.). GPS positioning speed: 90 seconds needed for the first time. 30 seconds normally. (can be affected by the weather and other conditions change) .  Data export and share Onelap Fitness, Strava (Data can be derived and shared by App).  Operating temperature: -10-50.    Specification:  Screen size: 2.5inch;  Endurance: 30hours;  Positioning System: 4-satellite positioning system positioning;  Waterproof rating: IPX6;  Automatic backlight: Yes;  Automatic calibration: Yes;  Charging time: 3.5h;  Standby time: More than half a year;  Extensible peripherals: Heart band, pedal, speedometer, power meter;  Traning Function: Ring recording, heart rate, warning, power warning;  Size: 75x55x18mm;  Storage capacity:8m;    Package included:  1 x Magene Bike Computer;  1 x Extension Rack;  1 x User Guide;  1 x Charging Cable