Wireless smart door bell

Material: ABS
Plug: EU Plug-in
Receiver voltage: AC110-220V
Available colors: white
LED light
Water resistant
Melodies: 36 polyphonic ring tones to choose from
Power: ≤200UA
Volume: 25-85db
Transmission power: <10MW
Working frequency: 315MHZ±0.5MHZ
Receiving distance: 120m (open area)
Transmitter power: 12V23A alkaline battery (not included)
Comes with: double sided tape & screws