Item Type: Home Video Doorbell Material: ABS Monitor Parameters: Screen: 7in TFT Resolution: 800x480 Power Supply: DC15V 2A Ringtone: 16 melodies 4 level adjustable Display Time: 60 seconds of calling, 30 seconds of monitoring Connecting Lines: 4 lines Camera Parameters: Lens: 1/4HD CMOS Light Source: 6 IR LED Installation: Door machine surface installation, indoor unit wall hanging Power: AC 100-240V Application: Suitable for villas, homes, offices, office buildings, government units and other places 1、Screen and Camera: 7 inch high definition large screen, 1/4in HD CMOS camera, clear images, two way radio, smooth intercom, and equipped with unlocking function. 2、Night Vision: Equipped with 6 IR LED light sources, with high definition night vision, built in high sound quality microphone, effectively monitor the outside. 3、Practical: 16 ringtones to choose from, four levels of volume adjustment, supports 60 seconds of calling, 30 seconds of monitoring, suitable for AC100?240V power supply. 4、Installation: Four core wire system, 30 meters need 0.5 mm wire, 50 meters need 0.75 mm wire, 100 meters need 1 mm wire, easy and convenient installation. 5、Wide Application: Suitable for use in villas, homes, office, government units, etc., surface installation of the door machine, and wall hanging of indoor machine . 1 x Monitor 1 x Outer Machine 4 x Terminal Cable 9 x Screw 7 x Expansion Tube 1 x Sticker 1 x Power Adapter 1 x Manual