EMOS Wireless Doorbell (P5712)

Power Supply of the Main Unit: 3× 1.5 V AA (not included)
Reach of the Button in Open Space: Up to 100 m
Transmission Method: Wireless
Transmission Frequency: 433 MHz
Number of Melodies: 16
Volume Control: Yes
Maximum Ringing Volume: 80 dB
Optical Signaling on the Doorbell: Yes
Optical Signaling on the Button: Yes
Special Functions: No
Option to Add Another Button: Yes, max. 8
Extra (Spare) Button: P5723T
Waterproof Button: Yes
Pairing Method: Self-learning (automatic pairing)
Power Button: 1× 3 V CR2032 (included)
Colour: Silver