Feature: 1. LCD SCREEN: Equipped with a 4.3 inch color digital LCD screen with no radiation and low power consumption, it displays a high definition widescreen picture, allowing users to view visitors clearly. 2. MULTIPLE FUNCTION: Support intercom without handheld, electric unlocking function, which can help you to observe the outdoor, and with mutual intercom function and non disturbance function. 3. ADJUSTABLE: The image brightness, chroma and volume of the indoor unit can be adjusted at will, so users can make adjustments according to their own needs to get the best using experience. 4. PREMIUM MATERIAL: The outdoor unit is made of all metal material, which is exquisite and not easy to be damaged. Meanwhile, it has infrared night vision function, so users can see the visitors clearly at night. 5. HIGH EFFICIENCY: The image and intercom functions work properly even with up to 200 meters of connecting cable, which ensures that users can use it conveniently at a long distance, providing safety and convenience. Specification: Item Type: Video Doorbell Intercom System Material: ABS Weight: Approx. 1075g / 37.9oz Screen Size: 4.3 Inch TFT LCD Display Ratio: 16:9 Ringtone: 25 Chord Bell Call Delay Time: 120S±10% Surveillance Delay Time: 40S±10% Camera Sensor: HD Color CMOS Up To 700TVL Outdoor Unit Infrared Night Vision Function: Low Opening 10LX Infrared On Indoor Unit Size: Approx. 193x213x52mm / 7.60x8.39x2.05in Outdoor Unit Size: Approx. 95x127x34mm / 3.74x5.00x1.34in Installation: Wall Mounted. Package List: 1 x Indoor Unit 1 x Outdoor Unit 1 x Indoor Mounting Plate 1 x 4P Connecting Cable 1 x Power Plug 6 x Screw 6 x Rubber Bolt 1 x Instruction Manual 3 x Accessory