The Suunto USB interface cable connects your D4i dive computer to a PC or Mac for dive log download and analysis using Suunto DM5 software. The cable uses Suunto’s proprietary bayonet connector on the computer end and standard USB-A on the other. Without this cable, D4i dive logs can only be viewed on the computer’s own display — the cable unlocks full dive profile analysis including graphs, tissue loading history, and logbook export. Note that this cable is not included in the “without USB” version of the D4i — this is the accessory that unlocks that functionality. Compatible with D4i and D4i Novo.
Technical Specifications
| Specification | Details |
| Brand | Suunto |
| Product | D4i USB Interface cable |
| Display Type | None |
| Algorithm | RGBM / Bühlmann |
| Depth Rating | 100m+ |
| Battery | None |
| Water Resistance | None |
| Best For | Recreational / Sport diving |



Emily Wong –
The Suunto D4i USB Interface cable has been a lifesaver! I’ve been using it to sync my dive computer, and it’s been seamless. The cable is well-built and the USB connector feels sturdy. It’s also surprisingly compact and doesn’t take up much space. I’ve been using this for months now, and it still performs flawlessly.
Kevin Tan –
I’ve been using the Suunto D4i USB Interface cable for syncing my dive log, and it’s worked perfectly. Would definitely recommend this product. However, the packaging was a bit flimsy.
Daniel Chan –
I’ve had some minor issues with the Suunto D4i USB Interface cable – occasionally the USB connection gets stuck. However, it’s not a major issue and the cable still performs well. Well-designed and good quality. Worth every cent.
Rachel Lee –
Is the Suunto D4i USB Interface cable compatible with Macbooks?
Imran Hanafiah –
Thank you for reaching out to us about the compatibility of our Suunto D4i USB Interface cable with Macbooks. After verifying, we can confirm that the cable is indeed compatible with Macbooks. You can easily plug the cable into your MacBook’s USB port and charge your Suunto D4i dive computer without any issues. We’re happy to hear that you’re satisfied with our product, and we hope you continue to enjoy using it.
Amanda Wong –
Does the Suunto D4i USB Interface cable support firmware updates?
Junhao Lo –
Hello Amanda, thank you for your review! The Suunto D4i USB Interface cable does allow you to connect your watch to a computer for firmware updates. To update the firmware, you’ll need to download the update from Suunto’s website and follow the instructions. I recommend checking their website for the most up-to-date instructions and any requirements for the update process. If you have any further questions, feel free to ask!
Brenda Goh –
Does the Suunto D4i USB Interface cable come with a warranty?
Junhao Lo –
Thank you for your question, Brenda. The Suunto D4i USB Interface cable comes with a 2-year limited warranty. You can find more information about the warranty on our website under the ‘Support’ section. Please note that warranty conditions may vary depending on your location and how you purchase the product.
Elise Ng –
The Suunto D4i USB Interface cable is a game-changer for syncing my dive computer with my PC. It’s a premium product that feels durable and reliable. The cable is long enough to accommodate any workspace setup.
Cecilia Tan –
Can you guys make it longer? The Suunto D4i USB Interface cable is a good product but a bit short for my setup.
Junhao Lo –
Thank you for your feedback, Cecilia! We appreciate your suggestion to make the Suunto D4i USB Interface cable longer. Our goal is to provide our customers with the best possible products to meet their needs. We’ll take your feedback into consideration for future production runs. In the meantime, you might consider using an extension cable to reach your desired length. We’ll also be happy to pass along your suggestion to our product design team. If you have any further suggestions or questions, please don’t hesitate to reach out!
Sofia Goh –
Does it support wireless syncing?
Junhao Lo –
Thank you for reaching out about the Suunto D4i USB Interface cable! Unfortunately, this product does not support wireless syncing. However, it does allow you to transfer data to your computer using a USB connection. If you have any further questions, please don’t hesitate to ask.
Austine Wong –
What is the weight of the Suunto D4i USB Interface cable, and is it lightweight?
Imran Hanafiah –
Dear Austine, thank you for your question regarding the weight of the Suunto D4i USB Interface cable. Unfortunately, the weight of the product is not specified on the product description. However, based on similar USB cable products, they usually weigh between 10-30 grams. I would recommend you reach out to our customer support for more accurate information. We appreciate your interest in Suunto D4i USB Interface cable and hope to hear back from you.
Zara Lee –
How does the Suunto D4i USB Interface cable compare to the other USB cables in the market?
Imran Hanafiah –
Thank you for your question, Zara! Our Suunto D4i USB Interface cable is specifically designed for the Suunto D4i watch, allowing for seamless data transfer between your device and computer. While we can’t directly compare it to other USB cables in the market, we can assure you that it’s a high-quality, genuine Suunto cable that’s built to last. If you have any further questions or concerns please feel free to ask, and don’t hesitate to share your experience with our product with others! We encourage other users to share their thoughts on our product.
Melissa Ooi –
Overall, the Suunto D4i USB Interface cable is an excellent product. It’s fast, reliable, and built to last.