AnjieloSmart 2/3/4 Units Apartment Intercom System Video Doorbell Camera Aluminum Alloy 7" Monitor 7 RFID Card

2/3/4 Units Apartment Video Door Phone Kits * With 4 wirs system connection. Using 4-cores cable to connect the camera and monitor. The max distandance is up to 100 meters. Different distance, use different diameter cable, please check the following from to choose correspnding cable. ( We will send 5 meters cable to you to test, for the longer cable, need to buy by yourself when installing) * Handsfree Dual-way Intercom and Indoor Monitoring When a visitor ring the bell, the monitor will be activated and show the image outside. Press the answer button, then you can talk to outside, press the answer button again to turn it off. If you do not press the button after conversation is finished or if no one answer the call, the monitor will turn off automatically after 60s. * Multiple ringtones - free switch The 25 chord ringtones can be switched freely, elegantly and fair-sounding. Both of the ringtones and volume can be adjustable, can meet the original needs of your time. Don't