Geo 4.0 has a brand-new stylish and sporty look! It features an updated display area with larger, crisper digits, Oceanic's patented Dual Algorithm, 5 optional color straps, and Bluetooth connectivity to all smartphones through the DiverLog+ App for the ultimate mobile experience. New and experienced divers can dive anywhere with Geo 4.0 and stay connected in style. Specifications FEATURES & FUNCTIONSGeo 4.0 Modes of Operation WATCH, AIR & NITROX, GAUGE, FREEDIVE Version WRIST WATCH Bluetooth 4.0 YES Color BLACK, WHITE (BLUE, YELLOW, SEA BLUE STRAPS ALSO AVAILABLE) Type DECOMPRESSION MODEL Firmware Update Auto Maximum algorithm depth 100 M Altitude adjustment 610 - 4200 M Decompression capability VARIABLE, 3,3 - 9 M/MIN AND 6,4 -18 M/MIN Activation WATER ACTIVATION AND PUSH BUTTON Decompression display YES, DIGITAL Back light LCD DISPLAY Alarms YES, VISUAL AND ACOUSTICAL Battery replacement USER REPLACEABLE BATTERIES Battery life 300 H Log entries 24 Interface Bluetooth connection to Diverlog+ Nitrox YES, 21-100 % Changeable gases YES, 2 NITROX MIXES Algorithm DUAL ALGORITHM (PZ+ AND DSAT) Tissue compartments 12 Console NO Warranty 2 YEARS