The RF signal strength and range of our products can be affected by a variety of things.

Wood ,glass, and plastic has minimal impact on RF signal strength.

Cement, human beings, vegetation, will allow the RF signal to pass though but it will be attenuated.

Metals, rocks, and crystals absorb or reflect the RF signal. This includes not only solid metal walls and counters, but metal mesh this will dramatically effect the RF signal strength and range.