The economical Envoy II octopus is the same internally as the ZX 2nd stage, but does not have the adjustment knob or the heat exchanger. The Envoy II Octopus has a Venturi Control Lever that allows the diver to set the octopus 2nd stage in the Pre-Dive position until needed.
Dive/Pre Dive Venturi Control
Weight: .54 lb. (.26 kg) ( w/o hose)
Hose Length: 30 in. (.76 m)