Features: 7inch TFT LCD, no radiation, low power consumption, high definition wide screen image. Speakerphone function, and electronic control unlock function. It has the function of monitoring the outdoor. Ultra-thin acrylic panel design, beautiful and stylish. 25 chords music to choose from, and you won't always hear the monotonous doorbell. Super waterproof, with night vision infrared function. Wall-mounted design, easy to install. Specification: Material: ABS & Acrylic panel & zinc alloy Weight: 1159g/40.9oz Color: Black Plug & Voltage: US Plug 100V-240V Display: TFT - LCD 7inch Resolution: 800*480 Receiver size: 240*150*23mm Power adapter: 5V/1A Video output formats: PAL and NTBS Video output: 1Vp-p CVBS Operating current: <400MA Working frequency: 2.4g ISM digital common frequency Ringer: 25 chords music Indoor Unit (receiver): 240*150*23mm/7.1*4.7*0.7inch Camera: 700 line CMOS color digital HD camera Power consumption: standby 0W, working 2W Power supply: indoor extension power supply Best distance for night vision: 2--3 meters Camera Angle: 90 degrees Night vision: 5 LED lights Operating temperature range: -20 to +60 Installation: wall hanging Outdoor Unit (camera): 125*50*40mm/6.1*3.9*2inch Package List: 1 x Doorbell Indoor Unit 1 x Doorbell Outdoor Unit 1 x Power Supply 1 x White Wire 2 x Instructions 1 x 2-core Wire 1 x 4-core Wire 1 x 5-core Wire 6 x Screw 1 x Hanging Plate 1 x Wrench Package List 17inch TFT LCD, no radiation, low power consumption, high definition wide screen image. 2Speakerphone function, and electronic control unlock function. 3It has the function of monitoring the outdoor. 4Ultra-thin acrylic panel design, beautiful and stylish. 5Super waterproof, with night vision infrared function.