Features: 7inch TFT LCD, no radiation, low power consumption, high definition wide screen image. Speakerphone function. Electronic control unlock function. It has the function of monitoring the outdoor. Image brightness, chroma, ringtone volume and intercom volume are adjustable. Aluminum oxide panels and wear-resistant surface treatment of the outdoor camera, HD 700 lines, no color. Indoor machine ultra - thin aluminum panel design, beautiful all show luxurious style. 16 chords and chords to choose from, and you won't always hear the monotonous doorbell. Super waterproof, IP55 waterproof, with night vision infrared function, Wall-mounted design, easy to install. Specification: Material: Aluminum alloy & PMMA & ABS Weight: 1100g/38.8oz Plug & Voltage: AU Plug 110V-240V, UK Plug 110V-240V, EU Plug 110V-240V, US Plug 110V-240V (Optional) Switching 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 Shot: 3.6MM92 degrees Indoor Unit: 180*120*18mm/7.1*4.7*0.7inch Outdoor Unit: 155*100*50mm/6.1*3.9*2inch Outdoor call intercom: press the button on the outdoor unit to talk to people indoors. Indoor call intercom: press the monitoring key to see the outside machine, and then press the intercom key to talk to people outside. Monitoring: press the monitoring key to see the situation of the external machine. Unlocking: the indoor machine has the function of unlocking. Hands-free: hands-free intercom function. Package List: 1 x 4-core 5-meter wire 1 x Power supply 1Set x Screws 1 x Instructions 2 x 2-core terminal wires 1 x Doorbell Indoor Unit 1 x Doorbell Outdoor Unit 2 x 4-core Wire Port 1 x 3-core Terminal Wires 1、7inch TFT LCD, no radiation, low power consumption, high definition wide screen image. 2、It has the function of monitoring the outdoor. 3、Image brightness, chroma, ringtone volume and intercom volume are adjustable. 4、Aluminum oxide panels and wear-resistant surface treatment of the outdoor camera, HD 700 lines, no color. 5、Indoor machine ultra - thin aluminum panel design, beautiful all show luxurious style.