This device is a flush-mounted, wireless, and batteryless metal pushbutton (diameter 22mm). It is equipped with a black cap. The reference ZB4RTA2 includes a transmitter equipped with a fixing collar and a spring return pushbutton head with an attached cap. The cap is factory-assembled and cannot be removed. The transmitter and the receiver communicate via 2.4GHz radio transmission (free worldwide band) Zigbee Green Power. The maximum sensing distance between the transmitter and the receiver in a free field is up to 100m. It is impact-resistant, dust-resistant, water-resistant, and vibration-resistant thanks to its IK03, IP66, IP67, IP69 and IP69K rating. This pushbutton head is ideal for situations where quick actions are required for a process or machine to function correctly. The wireless and battery-less interfaces are used for building utilities (automatic doors, lighting, etc.) and industrial applications (conveying systems, automotive, MMM, logistics, food and beverage). It complies with various radio agreements such as ANATEL, ARIB T66, FCC, ICASA, and RSS, as well as the standards of CSA C22.2 No 14, EN/IEC 60947-1, EN/IEC 60947-5-1, and UL 508. The Harmony XB5R range of wireless and battery-less interfaces suits various building utilities and industrial applications.