If you absolutely must stay connected, even underwater, then it can be done with the Alpha UWCP. A 40m cable connects a full face mask with an integrated microphone and speaker to a buoy with an electronic interface, which in turn can be used to connect to a cell phone via Bluetooth.

All it takes is a 9v battery and a Bluetooth equipped cell phone.

While this definitely has a place in emergency situations, I feel for the hapless diver that gets stuck with the workaholic dive buddy that absolutely must stay connected at all times. Some places should be sacred, and underwater is one of them.

Price: $1,790 [Random Good Stuff]

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