... to video, intercom, unlock, infrared night visionfunction! 1. outdoor temperature feature: before going out in the ... slight press, visible,press again, automatically unlockThis system can be used in apartments,villas,hotels,offices, ... Indoor Unit link * Lock open ability for 12V/1 electric door * Water resistance with wall mount- ... 4G Wireless video doorphone doorbell Intercom System 1 V more more V ...