Model Number：KS-SF20RPRO
Power Source:Battery, Plug
Feature:Vibration Function/welcome/music/alarm sound/lighting
Distance Transmission:280 M
Power supply:Battery +USB cable
Wireless Distance:280M
PIR motion sensing range:1-8M
Volume:80-96db
Battery:3*AA for receiver , 3*AAA for sensor
Program:1 receiver can connect with 32 sensors
Low battery indication:yes
Product Name:ring doorbell
