B1
VR2 Air and Nitrox open circuit dive computer, infra red Pc interface, 4 gases can be programmed. Upgradable to B2. Single AA battery
B2
VR2 Air and Nitrox closed and open circuit dive computer, infra red Pc interface, 4 gases can be programmed. Allows a fixed PO2
setpoint to be programmed with the VR3 for decompression.
Single AA battery
