Single button puck-style module in wrist boot Air and nitrox (21-50%) operating modes Manual or water activation, auto altitude adjustment from sea level to 14,000 feet Employs AA Buhlmann ZHL-16C decompression algorithm User-replaceable batteries, rental reset option Divers whose philosophy is that keeping it safe means keeping it simple will appreciate this easy to use, wristwatch-style dive computer that covers all the essentials and leaves out the frills. The TUSA Element Single Button Puck Style Dive Computer offers the most important dive data details, along with visual alarm and deep stop functions, all in an affordable package. Deep stop mode is activated when a dive exceeds 80 FT (24M) for more than 1 second. Upon ascent, the computer will display a deep safety stop screen and the recommended stop depth for a period of 2 minutes. This deep stop is highly recommended as additional opportunity to off-gas, but is not mandatory. If the diver chooses not to serve the stop it will not adversely affect the remaining no-decompression limits of the dive. Altitude smart mode allows the computer to automatically adjust for altitude diving. Stores data for up to 12 dives. Rental unit reset option makes this an ideal model for use in dive shops and on liveaboards. Factory-sealed, rugged design prevents flooding. Single button puck-style module in wrist boot Air and nitrox (21-50%) operating modes Manual or water activation Deep stop and standard safety stop options Automatic altitude adjustment from sea level to 14,000 feet No fly icon, residual nitrogen discharge time display Dive log stores a maximum of 12 dives User-replaceable battery with hot-swap (Battery: CR2450, 3V) TUSA algorithm based on Buhlmann ZHL-16c Variable ascent rate indicator Rental unit reset option