The doorbell kit has two indoor units, one outdoor unit, one remote control and one NO lock, the outdoor unit has a password and fingerprint unlock function, and the indoor unit also has an unlock function. Features: Indoor Unit 7-inch capacitive touch screen, no radiation, low power, high definition widescreen image Hands-free intercom function Electronically controlled unlocking function Monitoring outdoor function Ultra-slim touch screen design, beautiful and luxurious Volume, brightness and contrast are adjustable 16 kinds of chord sounds are optional, and you won't always hear monotonous doorbells Outdoor Unit Outdoor unit shell made of anti-oxidation acrylic with wear-resistant surface treatment Super rainproof, IP55 waterproof.Blue light button Infrared night vision function, wall mounted installation is simple and convenient Power-on unlock and power-off unlock, can be connected to exit switch Can be set to delay unlocking, 3-30 seconds optional Password/fingerprint/remote control unlock function Support 500 groups of saved passwords, 1000 groups of fingerprints, and 500 groups of remote control Installation method: wall-mounted Specification: Condition: 100% Brand New Material: Metal + PMMA + ABS Color: As picture shown Voltage: 110V-240V Plug: US, UK, EU, AU (Optional) Indoor Unit Size: approx. 225*128*23mm/8.8*5*0.9in Outdoor Unit Size: approx. 155*100*55mm/6.1*3.9*2.1in Doorbell Switch power supply: AC110V-240V 50Hz DC15V 1.2A Current: less than 800mA Call delay time: 120S ± 10% Monitoring delay time: 60S ± 10% Camera sensor: 700 lines Lens: 3.6MM 92° Outdoor unit with infrared night vision NO Lock Voltage: DC12V Current: 200mA Keep: 500kg/1102lb Fault protection, no mode (locked when power is off) Use a 2-wire nonpolar connection to access control or export equipment Signal output: no Package List: 2 * Indoor Unit 1 * Outdoor Unit 1 * User Manual 3 * 15V/2A Power Adapter 1 * Remote Control (Built in 1 * button battery) 1 * NO Lock (With 1 * User Manual, 1 * Pack of Screw) .