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This VR2W Quick Guide provides basic information on key 

VR2W procedures.  Full details for all VR2W procedures are 

found in the VR2W User manual.  We strongly recommend you 

study the full user manual before using this quick guide.

Make sure the two O-rings in the end-cap, and 

the corresponding O-ring surface inside the Outer 

Cylinder, are clean and debris-free. If the VR2W has 

previously been deployed, replace the O-rings.

O-rings

Do not bump the VR2W hydrophone or 

expose it to extreme temperature variations.

Doing so may damage the receiver and render it 

unable to detect transmitters.

Place VR2W on clean, stable surface so hydrophone hangs off edge.  We recommend 

working in a controlled environment.
Insert one steel rod into the Attachment hole and other one in the Bluetooth Activator 

Hole on the end-cap and hold on to the rods. 
Apply pressure to the rod in the Bluetooth Activator Hole to turn end-cap counter-

clockwise when you are facing the hydrophone.  Remove rod when end-cap turns easily 

and continue turning by hand. 
Slide end-cap and cylinder apart until the battery compartment 

has cleared the cylinder.  Be very careful not to damage the 

threads on the end-cap or the VR2W won’t close and seal 

properly.

Open Case

The battery is held in the battery compartment by a plastic pin spanning the opening. Remove the 

thin O-ring before removing the pin (O-ring holds pin in place). Downward force on battery may be 

needed to allow pin to move.

The battery is connected to VR2W on the side of the case. When installing 

the battery, listen for a “click” and watch that light flashes four times and 

then twice quickly every 5 seconds. When disconnecting battery, press 

the release tab on the battery connector and then pull connector halves 

apart.

Main Battery

Close the VR2W case by doing the reverse of opening it, but 

f

irst put one new desiccant pack in the bottom of the tube

Slide the flat end into the Outer Cylinder. Rotate the end-cap 

clockwise, using the steel bars when needed.
Stop turning when 

the gap between the 

two halves is closed. 

Over tightening could 

damage the case.

NOTE:

 Dessicant 

packs help reduce 

the occurrence of 

condensation in the 

VR2W.

Close Case

Electronics inside the case must 

NEVER come 

in contact with any water

 or the VR2W will be 

damaged.

TIP:

 Write the date on the battery.

VR2W Receiver

Quick Reference Guide

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