Features:  1. It adopts GPS active antenna, which has better signal receiving ability and faster positioning compared with ordinary passive antenna. And   GPS cold boot can be completed within 1 minute.  2. With ublox gps chip, It has higher receiving sensitivity to shorten the positioning time and improve the positioning accuracy;  3. The cycling computer has IPX6 level waterproof performance, support for use in rainy weather. Anti-dazzling screen is also great for riding under strong sunlight. no matter rainy or sunny, the cycling computer has always loyally accompanied your cycling.   4. With 2.5 inch screen, It's easier to see the information on the screen quickly and clearly during the day and night;  5. With 16M Internal memory, M2 can save about 3000km cycling data;  6. It supports BLE5.0, and can quickly synchronize data to mobile phone;    Specification:  Model:M2;  Material: Aluminium alloy+ABS;  Size:69x69x22mm;  Weight: 68g;  Screen size: 2.5inch;  Positioning: GPS+Glonass+Galileo;  Waterproof: IPX6;  Battery: 1100mAh, 30+hrs;  Memory capacity: 16M(150hrs of data);  Language: English;  Speed sensor: BLE 5.0/ANT+;  Cadence sensor: BLE 5.0/ANT+;  Heart rate sensor: BLE 5.0/ANT+;  Charge: Type-C(about 3.5hrs full charge);    Package included:  1x M2 Bike Computer;  1 x USB Cable;  1 x Bike Mount;  1 x Manual;  1 x Rubber Pad;  3 x Rubber Band