Safeall Audio Door Phone (Three Apartment)Microphone and Speaker SetTwo way intercom between outdoor unit and indoor handsetDoor phone waterproof and dustproof design, suitable for a variety of harsh environments.Simple installation, stable performance, easy maintenance http://safeall.in/audio-door-phone---3-panel
Safeall Audio Door Phone (Three Apartment)Microphone and Speaker SetTwo way intercom between outdoor unit and indoor handsetDoor phone waterproof and dustproof design, suitable for a variety of harsh environments.Simple installation, stable performance, easy maintenance http://safeall.in/audio-door-phone---3-panel