This is the Deepblu Cosmiq+ Dive Computer Scuba Diving Wrist Mount ComputerFeatures: Measures all vital dive data, performs decompression and saturation/desaturation calculations, for Standard Air and Nitrox dives. Deepblu Decompression Algorithm based on the calculations on the Buhlmann ZHL-16C model Three Safety Factor settings for the decompression algorithm: Conservative, Normal or Progressive Adjustable settings for Nitrox diving between 21% and 40% Dive Plan function for planning dives in advance Freedive Mode built specifically for apnea/freediving Bottom Timer setting with current depth gauge and overall runtime, and resettable stage time and average depth Sound and visual alarm warnings Dive logbook - saves dive data for up to 25 dives Wireless synchronization via Blue-tooth to upload and save dive data to the Deepblu mobile app to create digital dive logs Free over-the-air (OTA) firmware upgrades 2.2-inch high-contrast LCD screen with pixel-less EBTN technology Rechargeable lithium-ion battery with magnetic USB connector Built-in clock and calendar Ability to adjust settings by syncing COSMIQ+ with the Deepblu mobile app. The COSMIQ+ is a refresh of the original COSMIQ model, introducing an advanced bottom timer function for technical divers and a range of gorgeous new color options. With modes for freediving, recreational and technical diving, COSMIQ+ will appeal to divers of all walks and skill levels. At the push of a button, you can sync with the Deepblu App, allowing you to effortlessly create an interactive dive log and re-experience your dive after surfacing. "