Your safety underwater is guaranteed thanks to the built-in decompression algorithm Buhlmann ZHL-16C, which accurately calculates ascent profiles in real time. The Tusa Zen IQ-900 offers advanced settings for conservative calculations, allowing you to adjust safety stops based on your physical condition and environmental conditions. The visual and auditory alerts immediately warn you of any exceeding of ascent speed limits or decompression times.

For divers who wish to extend their time underwater, the watch offers full support for Nitrox mixes. The Zen IQ-900 allows you to program and manage up to 2 different gas mixes during the same dive, with oxygen concentrations ranging from 21% to 99%. Switching between gases is easy underwater with the press of a few buttons, making the watch an excellent choice for demanding and advanced dives.

The digital display of the Tusa Zen IQ-900 is designed to provide maximum readability under any visibility conditions. The smart arrangement of information clearly separates the current depth, remaining no-decompression limit (NDL), and water temperature. For dives in dark environments, caves, or at night, the built-in backlight activates instantly, offering uniform and clear illumination without blinding the diver.

After surfacing, the watch allows you to examine every aspect of your activity in detail. The digital logbook has a large recording capacity, storing data from your recent dives with detailed depth and time charts. Through the dedicated interface, you can connect the device to your computer (PC), transfer your history to Tusa's software, and maintain a complete digital record of your underwater experiences.

The Tusa Zen IQ-900 stands out for its sturdy construction, which combines an elegant stainless steel bezel with an extremely durable body made from composite materials. The device is designed to withstand depths of up to 100 meters, providing complete water resistance. The comfortable heavy-duty strap ensures a secure fit over your suit, while its thoughtful and compact design allows the watch to be comfortably worn as a sporty and stylish accessory in all your everyday appearances.