You can wear your Smart as a watch - it includes all the expected watch functions like a stopwatch, wake-up alarm, a second time zone, and the date. It also has a freediving mode with dedicated alarms and a bottom-timer mode with resettable average depth and stopwatch. The Smart fully supports Nitrox with two-gas capability. Its blue tooth functions allow you to load your dives directly into your digital dive logbook with SSI. The internal logbook records more than 40 hours of dive profile at a five-second sample rate.