Although targeted primarily to technical divers, the Scubapro Digital Depth Gauge is an ideal initial data delivery system for beginning divers, and it can be a useful backup instrument for divers of all skill levels. Using state-of-the-art technology, it reliably provides essential information including depth, maximum depth, temperature, bottom time and ascent speed. The Scubapro Digital Depth Gauge can be counted on to provide outstanding electronic accuracy in all diving conditions. Auto on/off feature means it's always ready to dive after a quick self-test. Variable ascent rates are displayed in a percentage and with a fast ascent warning. Depth-rated to 1080' to suit all technical and deep-diving scenarios. Surface interval is displayed for 24 hours for safety and convenience. Logbook provides data for the last 19 dives to allow for post-dive review and analysis. Provides automatic altitude compensation when changing dive locations. Great for technical, recreational, and free diving use. Gauge is made from durable plastic with a rubber wrist strap and weights 4.8 oz. (136 g). Depth gauge comes with an owner's manual.