The Ocean Reef Portable 9v battery tester (GSM) is an underwater communication system from Ocean Reef – lets divers talk to each other underwater. Clear, reliable, and depth-rated, it’s the gear that keeps dive teams coordinated at Sipadan’s UNESCO reef walls. Technical Specifications Specification Details Brand Ocean Reef Product Portable 9v battery tester (GSM) Range – Battery Rechargeable Depth Rating 100m Transmission Acoustic / Optical Best For Diver-to-diver communication Key Features Clear audio: Underwater communication that actually works – hear your dive buddy clearly. Depth-rated: Sealed and waterproof to 100m. Easy to use: Simple controls – works even with gloves on. Rechargeable battery: Long life between charges. Suited for Malaysian Dive Sites The Ocean Reef Portable 9v battery tester (GSM) is built to perform across Malaysia’s best underwater destinations. Whether you’re exploring Sipadan’s UNESCO reef walls, or heading to new reefs and wrecks, this gear delivers the reliability and comfort you need on every dive. Care & Maintenance Rinse after every use. Dry the mic and speaker ports thoroughly. Recharge between sessions. Store dry in a protective case. Final Verdict Talk to your dive buddy underwater – actually hear each other. The Ocean Reef Portable 9v battery tester (GSM) makes underwater communication reliable and straightforward.
