The Seac Action HR is a robust wrist-mount diving computers for scuba and freediving. Computer is easy to use, with 3 main modes: SCUBA MODE: Full management of recreational dive profiles with a Buhlmann ZHL-16C decompression algorithm for 1 or 2 mixes (air, Nitrox, and mixes with O2 concentrations up to 99%).GAUGE MODE: Depth gauge and stopwatch for managing your dive profiles independently. FREEDIVING MODE: Dive/surface time, current/maximum depth.

LOGBOOK MEMORY: SCUBA mode: 40 hours with records every 5 seconds. FREEDIVING mode: 18 hours of activity with records every 2 seconds. SAFETY WARNING: MOD exceeded alarm, deco stop violated alarm, ascent speed alarm, No Fly time and desaturation calculations, maximum permitted altitude warning. NDL only Dive Planner. Dive Manager software for MAC/PC (requires Windows 10), available free of charge at seacsub.com. Download data via USB cable (optional accessory). See SKU: SECACUSB Seac Download Cable for Action Computers. The Seac Action HR (High Resistant) has an ultra-durable structure treated for improved resistance to blows, corrosion, and swings in temperature. LCD screen with contrast and adjustable-intensity backlighting. Long-lasting user replaceable CR2450 battery. Computer has a maximum operational depth of 330' (100m), can be set for use in salt or fresh water, in imperial (feet) or metric (meters) increments of measurement and has a 12 or 24-hour time mode with dual time. Computer is altitude adjustable to 9,870' (3000m). Available in version with crown, buttons, and buckle in stainless steel. Computer comes with an owner's manual and rubber wrist strap.