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Home automation devices of the Polish company Zamel are high-quality products that enable building a comprehensive intelligent building management system. In addition to the Supla project under an open-source license, which uses Wi-Fi ESP8266 and the Exta Life series covering mainly transceivers operating at 868MHz radio frequency in a bi-directional transmission (full-duplex), Zamel also offers devices from the Exta Free series, which allow the user to build an attractive and practical intelligent installation in a simple way, without having to connect long cables. The Exta Free series modules use 868MHz half-duplex (single-directional transmission) radio frequency for communication, which means unidirectional transmission. The most important goal that the designers of the Exta Free system wanted to realize physically was the possibility of wireless communication of the modules. The small dimensions of Exta Free modules enable their installation in flush-mounted boxes. Thanks to the wireless communication option, the problem of routing communication and power cables has been eliminated. Thanks to this, there is no need for a thorough renovation, both in old buildings and newly built after the renovation. We also offer wireless remote controls that allow you to easily control intelligent installations at home.