This kit replaces the battery caps on earlier WM transmitters with caps that contain moisture absorbent desiccant beads.
These battery doors on the WM will absorb small amounts of moisture and humidity from the inside of the transmitter. You must still be careful to keep moisture out of the WM by opening it only in dry or sheltered areas and by making sure the battery surfaces are dry before installing them. Always use the WP waterproof mic connector in wet conditions. The desiccant doors will only remove a few drops of moisture.
Eventually, the desiccant beads absorb enough moisture that they will become ineffective and turn green or blue instead of the normally dry color of amber/orange. To recharge the desiccant, it must be heated to 200 to 400 degrees F for at least an hour, preferably more. The desiccant, the silicone O-ring seals and the doors can withstand maximum temperatures up to 400 degrees F (205 degrees C).
To easily dry the desiccant doors in an oven, separate the doors from the case by removing the center thumbscrew. All the parts will be remain fastened to one another by the cable between them. The doors can then be put into an oven at 200 degrees F for several hours. As the heat drives out the absorbed moisture, the desiccant will turn back to its normal amber/orange color. Do not put the WM transmitter itself into any oven or heating device. After heating, particularly at higher temperatures, the O-rings may need a tiny dab of petroleum jelly (Vaseline) to replace the lubricant that may migrate in the heat.
The replacement cap kit is pre-assembled at the factory and includes a hex key (allen wrench).
