Manufacturer part number:
SP2 it’s a perfect combination of functionality and style, both for freediving and “dry” training.
Its main features are:
The Cardio Chest Strap (optional) can be used both in Dive and Chrono mode. It features 5,3 KHz allowing underwater data transmission.
The Dive Master software allows dive data downloading of: dive time, maximum depth, water temperature, total calories, max/min heart rate (only using Cardio Chest Strap).
Software and SP2 Firmware are very easy to use and their updating is available at Dive Master software when released.