Metal waterproof camera, the outdoor camera equip with a weatherproof cover, can be used outside even in very bad weather. The outdoor camera build-in 5 infrared LED light.With this function, you can see outside no matter day or night, keep your home more safer. One camera can working with 6pcs indoor monitors. One monitor can working with 2 cameras. The camera can talk with the monitor. The monitor can talk with one of the monitor too. 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 need to worry about can't hear voice or hear it too loud any more. 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.