1. Luminous display still clearly visible in extremely dark environments
2. 100m waterproof scuba dive
3. Support compass mode before scuba dive we need to calibrate compass
4. Support altimeter and barometer
5. Silicone strap, tough scratch-resistant glass, high light transmission
6. 316L stainless steel corrosion resistance
7. Battery: CR2450
8. Size: 4.7x1.5cm
