WiFi APP Smart Notrufknopf für Senioren auf Handy, WLAN SOS Notruf, Hausnotruf
WIFI standard: IEEE 802.11 b/g/n 2.4G. Doorbell Function Support 433MHz Wireless Detector Smart Life APP. Alarm current: ≤200mA. It has multiple music to switch between. You can use different scenes to switch to different music.