With a clear LCD, multiple dive modes, Bluetooth connectivity, and the trusted Bu;hlmann algorithm, it offers precision and ease in a compact design. Features like Safety Stop+, two-button navigation, and a user-replaceable battery make it ideal for all levels of diving. Lighter Design. Limitless Performance. The Sirius L, the streamlined evolution of Mares&'; high-performance dive computer. Designed for divers who demand power and precision without the extra bulk, the Sirius L combines essential features, intuitive usability, and lightweight comfort. Features: Chip-on-Glass LCD screen for clear underwater viewing Dive modes: Air, Nitrox, Multi-gas, Freedive, Bottom Timer Supports up to 3 gases for multi-level diving Bu;hlmann ZH-L16C algorithm with gradient factor customization Optional Safety Stop+ based on real-time ascent profile Bluetooth enabled for app sync and firmware updates Log memory for 100 dives with graphical data CR2450 user-replaceable battery rated for approx. 100 dives Intuitive two-button interface usable underwater Time, alarm, and countdown timer for everyday use Dive modes: Air, Nitrox, Multi-gas Nitrox, Freedive, Bottom Timer Multi-gas capability: up to 3 gases Bottom Timer mode with resettable average depth and stopwatch Decompression dive planner with user-adjustable surface interval Strap is easily replaceable with color straps or a bungee mount (sold separately) Modes: Air Nitrox Multi-Gas Nitrox (Up to 3 gases) Gauge Free Dive (apnea) - bottom timer Technical Specs: Battery duration - Approx. 200-300 hours of diving Nitrox use - EAN from 21% to 99% Max Displayed Depth = 328&'; (100m) Ascent Rate Indicator - Yes (m/min - ft/min) Memory Capacity = > 200 hrs Profile Sampling Rates = 5 s Display - Segment Display Gas Switching - Yes Stopwatch - Yes Dual Time - No Daily Alarm - Yes Plan Mode - Yes Fresh and Seawater Settings - Yes CHOICE_MET_IMP - Yes RESID_NITRO_RESET - Yes Option To Exclude Audible Alarms - Yes Exclusion of "Uncontrolled Ascent" - Yes Altitude Adjustment - Yes Upgradeable software - Yes Air Integrated - No Dive Hours per Charge - 200-300 hrs. Graphic and Numeric Tank Pressure - No USB Charger - No Battery Info - Required, Included Battery Material - Lithium Battery Type - CR2450 Battery Quantity = 1