M521 Outdoor Wireless Doorbell Smart Home Security Welcome Chime Kit Door Bell

Itercom: No
Connection Type: wireless
Alarm: Yes
Power: Electric Supply
Feature: None
Display: None
Item Type: Wireless Doorbell
Ring Songs: 57 Music songs
Working Voltage: 100~240V
Working Power: 0.5W
Receive Frequency: 433MHz
Receive Distance: 80 meters
Feature1: Wireless Doorbell
Feature2: Wireless Smart Doorbell
Feature3: Home Wireless Smart Doorbell
Feature 4: Welcome mode
Feature 5: Alarm mode