A. The visitor taps the outdoor unit call button, the indoor unit will automatically turns on the image, and at the same time, the preset ringtone is sounded. Press the indoor unit intercom button to talk to the visitor. If the visitor needs to press the unlock button, the electronic lock is automatically activated. Open (this product contains an electronically controlled lock), no need to go to the door to open the door; B. If you want to view the outdoor scene, press the monitor button; you need to do not disturb during the break time, press and hold the indoor unit intercom button for 2 seconds to start the function. At this time, if the visitor presses the outdoor unit call button, only the image will not Ring, press any button on the indoor unit to exit the function; C. Take photo recording function, call to take a photo, insert the card and record (this set does not contain TF card); D. With password card unlock function, with two management cards, three user cards, support up to 2000 user cards. Features: 7 inch color LCD display screen, without radiation, low power consumption, high definition 24 kinds of different melodies for your choices.Volume, brightness and contrast are adjustable. Ultra-slim design, nice and luxurious, and with a mounting plate, it can be installed on walls easily. Outdoor camera with clear IR night vision can monitor and capture images in low-illumination environment. Combines many functions in one: two-way intercom, surveillance, unlock, hands free call and talk, etc. Support ID card and password unlock, practical and convenient to use. Can be widely used in single-family houses, villas, offices, hotels and so on. Specification: Condition: 100% Brand New Material: Aluminium alloy +PMMA +ABS Color: As picture shown Voltage: 110-240V Plug: AU, UK, US, EU (Optional) Display resolution: 800*RGB*480 Power supply: AC110-240V-50Hz DC15V 1.2A Current: less than 800mA Call delay time: 120S ± 10% Monitoring delay time: 40S ± 10% Camera sensor: HD color CMOS or CCD up to 700 lines Outdoor infrared night vision function: low open 10LUX infrared Indoor unit installation: wall-mounted Outdoor unit installation: wall-mounted Connection cable: 5-core connection cable(1m) + 2-core terminal cable (connected to NO lock) Size: Indoor Unit: 235*145*21mm/9.2*5.7*0.8in (W*H*D) Outdoor Unit: 90*180*24mm/3.5*7.1*0.9in (W*H*D) NO Lock Voltage: DC12V Current: 200mA Hold: 500kg /1102 lb Power off to lock, Power on to unlock Package List: 1 * Indoor Unit 1 * Outdoor Unit 1 * Indoor Unit Hanging Board 1 * 5-core Connection Cable (1m) 1 * Power Adapter 1 * Screw Pack 5 * User Card 1 * User Manual 1 * NO Lock (With screw and manual) 1、7 inch color LCD display screen, without radiation, low power consumption, high definition 2、24 kinds of different melodies for your choices.Volume, brightness and contrast are adjustable. 3、Ultra-slim design, nice and luxurious, and with a mounting plate, it can be installed on walls easily. 4、Outdoor camera with clear IR night vision can monitor and capture images in low-illumination environment. 5、Combines many functions in one: two-way intercom, surveillance, unlock, hands free call and talk, etc.