... and secure.3. picture archive features: Masters at home, a visitor, as long as the lightring the ... , free intercom call, voice clarity, as in the front.5. remote control lock function: family home too late ... slight press, visible,press again, automatically unlockThis system can be used in apartments,villas,hotels,offices,public ... 2.4G Wireless video doorphone doorbell Intercom System 1 V more more V 1