After installing in more than a million buildings our real world experience shows that devices should achieve approximately 25-30M (80-100ft) in a typical building. As with any RF, line of sight will be substantially further and trying to go through brick, concrete and steel will attenuate this signal. Since they operate at 800-900 MHz EnOcean devices will travel through these materials with more ease than 2.4 or 5 GHz RF. most of the devices operate without batteries or wires.