The SP2, in addition to the typical functions of the best freediving computer, may be associated with a heart rate monitor. The heart rate can be used both in the water or during the training out of the water.
The Cardio Chest Strap (optional) can be used both in Dive and Chrono mode. It features 5,3 KHz allowing underwater data transmission.
The connection to the PC, with the appropriate interface cable and the program dedicated DIVE MASTER (available at Omersub website) allows all dive data downloading.
Software and SP2 Firmware are very easy to use and their updating is available at Dive Master when released.