Wireless WiFi smart remote monitoring doorbell $ 8.57 Item No.: S2 Model: S2 Power supply mode: household electricity Power supply voltage: AC 110V-220V (V) Ringtones: polyphonic Scope of application: home office Type: Indoor Chord Dingdong Machine S2 Dingdong machine description: One: The Dingdong machine and the doorbell receive and send signals (433MHz), and the Dingdong machine makes a sound. Two: Plug and play, no wiring required. 3: Built-in 38 chord music is optional, the volume is adjustable.
