Doorbell - Output signal range: 120m, Learning code allows several bells and buttons to be paired into one set, 16 polyphonic melodies, button ring LED, button tag, watertight IP44 button protection, 3 way bell (50-90dB), bell mounting via mounting holes, button mounting with self-adhesive pad or mounting holes, power: button: 1 x 12V (LR23A) battery (included)