This product cannot replace the formal diving training and training. This product is only intended for use by divers trained by a certified professional diver and are familiar with the operation of diving equipment. SIZE: Naked Watch Weight: 123g, Dial Width: 50mm, Thickness: 16mm, Length: 27cm Silicone strap material, stainless steel case. Oxygen level setting, diving, zero time, safety factor setting, 100 metres, free diving, compass, altimeter, barometer, thermometer, world time, date and time, timer, countdown, alarm, luminous, makes it readable at night. With its simple and generous dial design and accurate and clear time display, the watch meets the demands of professionalism and sophistication for business occasions. › See more product details; Product description S1 button: short press the backlight, long press the lock screen and lock button. S2 button: up/down/OK, long press, enter settings S3 Key: Exit/Back S4 button: switch under range and value settings + 1 1. Time display function, display time, minute, second, month, day, Week, 12/24H, initial value is (2020-1-01 12:00 00 MI). 2. Alarm function. 3. Countdown function, the initial value of (0:00.00,12:00 (0FF) 4. Stopwatch function, the initial value is (0:00,000, (0FF) 5. Pedometer, training time, pace, mileage, calories burned. 6. Height, relative height. 7. Air pressure curve, air pressure, air pressure curve view (24H). 8. Recording training time, viewing relative height of movement. 9. Diving function, you are scuba diving, you are free diving. scuba diving with NDL time, depth, temperature, diving speed. 10. Diving log book (99 records). 11. Compass calibration function. 12. Low-power reminder. 13. Backlight function. 14. 4 key functions. 15. Use the CR2450 battery; Product description S1 button: short press the backlight, long press the lock screen and lock button. S2 button: up/down/OK, long press, enter settings S3 Key: Exit/Back S4 button: switch under range and value settings + 1 1. Time display function, display time, minute, second, month, day, Week, 12/24H, initial value is (2020-1-01 12:00 00 MI). 2. Alarm function. 3. Countdown function, the initial value of (0:00.00,12:00 (0FF) 4. Stopwatch function, the initial value is (0:00,000, (0FF) 5. Pedometer, training time, pace, mileage, calories burned. 6. Height, relative height. 7. Air pressure curve, air pressure, air pressure curve view (24H). 8. Recording training time, viewing relative height of movement. 9. Diving function, you are scuba diving, you are free diving. scuba diving with NDL time, depth, temperature, diving speed. 10. Diving log book (99 records). 11. Compass calibration function. 12. Low-power reminder. 13. Backlight function. 14. 4 key functions. 15. Use the CR2450 battery; S1 button: short press the backlight, long press the lock screen and lock button. S2 button: up/down/OK, long press, enter settings S3 Key: Exit/Back S4 button: switch under range and value settings + 1 1. Time display function, display time, minute, second, month, day, Week, 12/24H, initial value is (2020-1-01 12:00 00 MI). 2. Alarm function. 3. Countdown function, the initial value of (0:00.00,12:00 (0FF) 4. Stopwatch function, the initial value is (0:00,000, (0FF) 5. Pedometer, training time, pace, mileage, calories burned. 6. Height, relative height. 7. Air pressure curve, air pressure, air pressure curve view (24H). 8. Recording training time, viewing relative height of movement. 9. Diving function, you are scuba diving, you are free diving. scuba diving with NDL time, depth, temperature, diving speed. 10. Diving log book (99 records). 11. Compass calibration function. 12. Low-power reminder. 13. Backlight function. 14. 4 key functions. 15. Use the CR2450 battery
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