The Ocean Reef M-101A G-Divers Underwater Receiving Unit 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 Redang’s shallow reef flats.
Technical Specifications
| Specification | Details |
| Brand | Ocean Reef |
| Product | M-101A G-Divers Underwater Receiving Unit |
| 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 M-101A G-Divers Underwater Receiving Unit is built to perform across Malaysia’s best underwater destinations. Whether you’re exploring Redang’s shallow reef flats, 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 M-101A G-Divers Underwater Receiving Unit makes underwater communication reliable and straightforward.




Julia Tan –
Are there any plans to make a waterproof version that doesn’t require a separate power source?
Imran Hanafiah –
Thank you for sharing your thoughts and ideas about our product, Ocean Reef M-101A G-Divers Underwater Receiving Unit. We truly appreciate your feedback and would love to hear more about your expectations for a waterproof version without a separate power source. Unfortunately, as of now, we do not have any concrete plans for a product like that. However, we’ll take your suggestion into consideration for future product developments. Thank you again for your input!
Ella Wong –
Is there a version available that is compatible with older smart devices?
Junhao Lo –
Thank you for your inquiry, Ella. Unfortunately, the information provided to us does not specify the compatibility of the Ocean Reef M-101A G-Divers Underwater Receiving Unit with older smart devices. However, we can look into this further for you. Can you please specify the type of smart device you are using? We’ll do our best to provide a suitable solution.
Eleanor Sim –
I’ve been using this unit for a few weeks now and I’m really impressed with its performance. The underwater communication is crystal clear and I can hear my crewmates perfectly even at 50 meters depth. The unit is well-made and durable, I’m not worried about it getting damaged in rough waters.
Kacie Teo –
This unit has exceeded my expectations in every way. The audio quality is superb and the device is very easy to use. I’ve even used it in conjunction with other devices and it’s worked flawlessly.
Emily Koh –
I bought this underwater receiving unit to use with my dive team. The Ocean Reef M-101A is well-built and has been reliable so far. Its durability has been impressive, and it can withstand rough handling. However, it can be heavy and cumbersome to wear for extended periods.
Sophia Wong –
Overall I’m very satisfied with the Ocean Reef M-101A G-Divers Underwater Receiving Unit, but I’d give it 4 stars instead of 5 because the rechargeable battery can be a bit finicky at times.
Isabella Tay –
I have been using the Ocean Reef M-101A for a long time now. It still works well and its reliability has been impressive. My only gripe is that it can be a bit pricey, but I guess that’s what you get for quality.
Sophia Lee –
What type of waterproofing technology is used to protect the electronic components of this underwater receiving unit?
Imran Hanafiah –
Hello Sophia, thank you for your question about the Ocean Reef M-101A G-Divers Underwater Receiving Unit’s waterproofing technology. Our product expert informs me that this unit utilizes a specialized rubber casing and advanced EPDM gasket technology to keep the electronic components fully protected under water. EPDM stands for Ethylene Propylene Diene Monomer and is a synthetic rubber known for its excellent resistance to water. Additionally, the product is also tested under water according to the IP68 standard, which means that it can withstand exposure to up to 4 meters (13.1 ft) of water for an extended period of time without compromising the integrity of its water-resistant properties.
Ava Wong –
I used the Ocean Reef M-101A G-Divers Underwater Receiving Unit for a week in the depths of the ocean. It is easy to use and the clarity of the sound was excellent. Would love to try the newer models.
Avery Ng –
What’s the recommended way to store and maintain the Ocean Reef M-101A G-Divers Underwater Receiving Unit?
Imran Hanafiah –
Dear Avery, thank you for reaching out to us. To ensure the longevity of your Ocean Reef M-101A G-Divers Underwater Receiving Unit, we recommend storing it in a cool, dry place, away from direct sunlight. The unit should also be kept away from any magnetic fields. Regularly clean the unit with a soft cloth and mild soap solution to prevent any damage from corrosion. In addition, we suggest checking the unit’s battery every 6 months and replacing it if necessary. If you have any further questions, please don’t hesitate to ask. Other customers with this product may also have questions, so please feel free to share your experiences in the comments below. Yours sincerely, Ocean Reef Customer Support.
Emily Koh –
Will the Ocean Reef M-101A G-Divers Underwater Receiving Unit break my bank?
Imran Hanafiah –
Hello Emily, thank you for your question. As for the cost, our Ocean Reef M-101A G-Divers Underwater Receiving Unit has a regular price of $1830. However, we occasionally offer discounts and promotions. To find out the current price and any available deals, I recommend checking our website for the latest updates or contacting our customer support. They’ll be happy to assist you with any questions or concerns.
Celine Goh –
I recently purchased the Ocean Reef M-101A G-Divers Underwater Receiving Unit and I must say it’s been a game-changer for my diving experience. The unit is sleek and easy to use, and it’s given me a whole new level of confidence underwater.
Katherine Goh –
Overall, I am quite happy with the Ocean Reef M-101A G-Divers Underwater Receiving Unit. The price may be a bit steep, but I feel that it’s worth it considering its quality and performance. One minor complaint is that the antenna could be a bit longer.