• Hardwired, full duplex surface unit for underwater communications.

• 2 ports for 2 communication cables.

• On/off and volume adjustment switches.

• Microphone.

• Switch for communication between surface & diver 1, surface & diver 2, surface & diver 1 & diver 2.

• Headset port (headset optional).

• External 12v power port (cable optional).

• Battery charger port.

• Audio/video recall.

• Incorporated speaker.

• 12V rechargeable battery.

• Underwater unit volume adjustment (for both divers).

• Stand-by autonomy: 24h.