• Triple-mode communications:
  • Wireless ultrasonic: always-on receive on Channel 1; PTT to transmit on Channel 1.
  • Hardwired full-duplex: connect to ALPHA PRO X DIVERS surface unit for hands‑free, simultaneous talk/listen.
  • VHF interface capable: connect to a dedicated surface VHF radio via separate interfacing kit and waterproof bag.
• Underwater plug-and-play cabling: six‑pin waterproof connector allows connecting/detaching the cable underwater.
• Permanent wireless receive: unit is always listening on Channel 1; PTT activates transmission.
• D‑Mic dynamic microphone with hydrophobic membrane: clear voice, bubble‑noise reduction, robust membrane withstands >14.7 PSI differential.
• NACS adjustable mount: comfortable, adjustable positioning on OCEAN REEF Space/Neptune masks.
• Serviceable battery compartment with O‑ring seal and replaceable 9V alkaline battery.

Inside the box

• GSM CUBE3 R2 communication unit
• Six‑pin protective plug (for when cable is not connected)
• D‑Mic dynamic microphone (with hydrophobic membrane)
• NACS mounting interface components for OCEAN REEF IDMs
• Battery compartment cap and O‑ring
• Owner’s Manual

Technical Specifications

• Wireless frequency: Channel 1 ultrasonic at 31.768 kHz (PTT to transmit; always-on receive).
• Connectivity:
  • 6‑pin waterproof connector for hardwire to ALPHA PRO X DIVERS.
  • Interface-ready for VHF via separate surface interface kit and waterproof bag.
• Power: 9V alkaline battery only. User-replaceable. Observe polarity protection.
• Mounting: Compatible with all OCEAN REEF IDMs; optimized for Space/Neptune masks via NACS.
• Microphone: D‑Mic with hydrophobic membrane; designed to reduce exhalation bubble noise.
• User controls/indications: PTT transmit button; call/receive via wireless; full-duplex when hardwired.
• Environmental: Designed for immersion; rinse with fresh water after dives; avoid solvents and direct sunlight. 

Compatibility

GSM CUBE3 R2 can be assembled on OCEANREEF full face masks with an Extender Frame and also on OTS, Interspiro AGA & Kirby Morgan M-48 MOD-1 full face masks using proper OCEANREEF adapters. GSM CUBE3 R2 works with all OCEAN REEF UW wireless units and competitor units if they communicate on same channel. 

Certifications

Manufactured by an ISO 9001:2015 certified company.

Warranty

2 years warranty.

Warnings

For California Residents: this product can expose you to chemicals including BPA, which is known to the State of California to cause cancer, and Phtalates, which are known to the State of California to cause birth defects or other reproductive harm. For more information go to http://www.P65Warnings.ca.gov.