https://www.zigbee2mqtt.io/devices/SB04-Zigbee.html
RSH SB04-Zigbee control via MQTT | Zigbee2MQTT
Integrate your RSH SB04-Zigbee via Zigbee2MQTT with whatever smart home infrastructure you are using without the vendor's bridge or gateway.
zigbee controlrshviamqtt
https://www.di.univr.it/?ent=progetto&id=5805&lang=en
Design and development of Wifi, BLE, ZigBee and LoraWAN control boards for the application of BOXIO...
Dep.Computer Science,University of Verona
design and development
https://www.tiscontrol.com/en/zigbee_keyfob.html
ZigBee Key fob | Security Remote Control | TIS
Arm your security and alarm system with the handheld Zigbee key fob (4-button remote control).
key fobremote controlzigbeesecuritytis