I may have had a defective unit, it happens with any product

Unit clouded and is unusable once the cold weather hit and does not clear up in warmer dry weather.

So, either the units are bad or unable to transmit through the obstructions.

The wireless unit did work when bench tested so I will keep it for a future project

Would not work in my 06 Colorado, was told these wireless units are pretty susceptible to interference

Poor signal unit no output from sending unit.

That said this unit is well worth the money in order to not have to run wires in a large vehicle from the front to the back!

This unit caused massive static throughout my system, whether the radio/input was on or in standby, when connected

This unit is very easy to install.

However the unit failed to transmit anything

: The company contacted me because of the faulty wireless units and gave me a full refund

When I originally tested the device, I hooked it up under constant power for maybe 10-15 minutes and the units got warm quickly as other posters have mentioned.