Features: Indoor unit: 7-inch TFT LCD, no radiation, low power, high definition widescreen image. It has a hands-free intercom function and an electronically controlled unlock function. You can monitor the outdoors and adjust the image brightness, chrominance and volume. The outdoor unit is made of aluminum alloy, which is resistant to oxidation and wear on the surface. 12 chord sounds are optional, so your doorbell is not monotonous. Outdoor unit: It is rainproof with night vision infrared function. The surface of the metal material is wear-resistant. It can be electrically unlocked.Wall-mounted installation is simple and convenient. Specifications: Condition: Brand New Color: Shown as Picture Material: ABS+PMMA Optional Plug Type: AU Plug, UK Plug, EU Plug, US Plug Switching Power Supply: AC 110 V-240 V--50 Hz DC 15 V 1.2 A Machine Current: Less Than 800 mA Call Delay Time: 120 S ± 10% Monitoring Delay Time: 60 S ± 10% Camera Sensor: OV1030 420 Line Lens: 3.6MM92 Degrees Indoor Unit Size: Approx. 165 * 235 * 35mm/6.5 * 9.3 * 1.4 in Outdoor Unit Size: Approx. 155 * 100 * 50mm/6.1 * 3.9 * 2.0 in Package List: 2 * Four-core 5 Meter Line 2 * Power Supply 1 * Instruction Manual 2 * Indoor Unit 1 * Outdoor Unit 1、7-inch TFT LCD, no radiation, low power, high definition widescreen image. 2、It has a hands-free intercom function and an electronically controlled unlock function. 3、You can monitor the outdoors and adjust the image brightness, chrominance and volume. 4、The outdoor unit is made of aluminum alloy, which is resistant to oxidation and wear on the surface. 5、12 chord sounds are optional, so your doorbell is not monotonous.