Wireless Doorbell P5728

button dimensions: 19 × 42 × 72 mm
>colour: black
>doorchime dimensions: 26 × 81 × 81 mm
>extra (spare) button: P5728T
>maximum ringing volume: 90 dB
>number of buttons in a package: 1 pc
>number of melodies: 52
>number of receivers in a package: 1 pc
>optical signaling on the button: yes
>optical signaling on the doorbell: yes
>option to add another button: yes, max. 6
>packaging: 1 pc, blister
>pairing method: automatic pairing–self-learning
>power button: 1× 12 V A23 (included)
>power supply of the main unit: 3× 1.5 V AAA (not included)
>reach of the button: 180 m
>special functions: no
>transmission frequency: 433 MHz
>transmission method: wireless bell
>volume control: yes, 5 levels
>waterproof button: IP56