Main unit power supply - 3 × 1.5 V AAA (not included) + micro-USB 5 V
Button - 1 × 3 V CR2032 (included)
Button range - 100 m
Optical signal button - Yes
Optical clock signaling - Yes
Possibility to add buttons (P5732T) - Yes, max 16
Volume control - Yes, 4 levels
Maximum volume - 90 dB
Number of melodies - 38
Color - white
Pairing method - automatic
Waterproof Button - Yes
Transmission method - Wireless doorbell, transmission frequency 433 MHz