A:When we show the "range" of a product, we are showing you the manufacturer's published ranges. Typically, these are ranges that occur in ideal situations with no interference from environmental factors or building materials. Common sense tells you anything that stands in between the wireless transmitter and the receiver will diminish the range of the product...the question is how much.
While there is not definitive rule, here are some basic guidelines:
Wall Type Range Reduction
Dry-lined partition wall 10–20%
Single-layer brick wall 20–30%
Double-layer brick wall 30–50%
Concrete wall 50%-60%
Metal panel, steel wall 80–100%