Wireless WiFi smart remote monitoring doorbell

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.