Aquatec Duo-Alert underwater alert system
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- Aquatec Duo-Alert Air Powered Surface & UnderWater (U/W) Signaling Device
- Signal in U/W and Surface, Volume:Approx. U/W:115-125dB Surface: 125~130dB
- It's very loud keep away from your ears.
- After each dive, the device should be pressurized, and activated in order to blow the trapped water out of unit. Always rinse with fresh water after use.