Cressi Digi2 Digital Console The Cressi Digi 2 Digital Console automatically activates when connected to your scuba cylinder and provides a high contrast display of Depth with a range of 0 to 120 metres (0 to 394 ft), Tank Pressure from 0 to 300 bar (0 to 4,350 psi) and Water Temperature from -10°C to +50°C (14°F to 122°F). The digital console also provides Residual Gas Time in minutes, indicates a Gas Reserve of 50 bars (725 psi), and Maximum Depth of dive. The Cressi Digi 2 Digital Console is NOT a dive computer. Think of it as a SPG and Depth gauge on steroids! The battery is user-replicable with a sealing sensor. After the battery is replaced it does a self-check and will alert you if not properly installed. That being sad, the battery could last up to 1,000 hours, and once the battery sensor flashes for low battery you still haec around 1 week of battery life remaining. The screen has an auto shut-off to help conserve battery life.