#Blue_sea Please take a look at my other products as well! [Product Features] Japan Aqualung The i550, with its simple operation, robustness, and multiple functions, is the perfect dive computer for both beginners and veterans. With air integration, nitrox mode and gauge mode, built-in backlight, and easy-to-read remaining pressure display, all functions are set on a large console, allowing you to enjoy diving with peace of mind. Main Specifications 3 operation modes Air, Nitrox, Gauge (with run timer) Battery Replacement User-replaceable battery with data retention function that preserves settings and calculations during replacement *Submersion after user battery replacement is not covered by warranty. Please understand this beforehand. Air Integration: Clearly displays tank pressure on a large screen. A patented algorithm calculates remaining air time in real-time, enabling accurate air management. Backlight: Equipped with a backlight for easy viewing in dark places. Other Main Features ・Enhanced safety with warning sound and LED warning light function ・Pre-dive function to maximize support for safe diving planning ・By updating the software with the optional download cable, you can use the latest features and versions, and always obtain an accurate profile. ・Automatic altitude adjustment function allows you to always obtain an accurate profile. ・With the push of a button, you can check recent dive information (maximum depth and dive time). ・History mode displays total number of dives, maximum depth, total dive time, and minimum temperature. ・Supports O2 up to 100% ・Deep stop function with countdown timer (optional function) ・Gauge mode with a wide measurement range ・Seawater/freshwater selection available [Shipping] Shipping included, free shipping Reliable Mercari shipping, anonymous delivery [Other] Fins, diving accessories, small items Mask, regulator, boots, BC Snorkel, dive computer Gloves, wetsuit, drysuit Diving equipment for sale, such as these. Please take a look #scubadiving #freediving #snorkeling #snorkeling #snorkel #snorkel #marinesports #mouthpiece #diving #blacksilicone #mouthpiece #regulator #octopus #scubadiving