... Temperature display function* On Screen Indicators - Monitor State, Lock/Unlock, Talk, Take a Picture, Increase Volume, Decrease ... to trigger Indoor Unit link* Lock open ability for 12V/1 electric door* Water resistance with wall mount ... ,RoHS,R&TTEWireless video door phone, Wireless video door bell, Video door phone, Wireless door phone, wireless doorphone, wireless door bell, wireless video doorphone ...