△Time display function, display hour, minute, second, month, day, week, 12/24H, the initial value is (2020-1-01 12:00 00 WED)△Alarm function△Display: FSTN screen△Size: Dia47xT15mm△Barometer: 300-1100hpa△Waterproof limit: 100m△Maximum depth: 50m△Battery: CR2450△Net weight: 123g△Countdown function, the initial value is (0:00.00, 12:00 (0FF)△Stopwatch function, the initial value is (0:00'00 0, (0FF)△Step counting, exercise time, pace, mileage, calorie calculation△Altitude, relative altitude△Air pressure change curve, air pressure, air pressure curve view (24H)△Exercise time record, exercise relative height view△Diving function, one is scuba diving, the other is free diving. Scuba diving with NDL time, deep diving, water temperature, diving speed△Diving records can store 99 records△ Compass correction function 3.2 Key function