1、Multi Use: This door bell system has the functions of photographing, video recording, visitor recording and calendar. 2、HD Screen Display: Equipped with HD screens on both indoor unit and outdoor unit, this door bell is easy for you to monitor and use, very practical! 3、Support Multiple Languages and Musics: This door bell system supports 6 different languages, English, Russian, French, Spanish, German and Simplified Chinese. And 16 ringtones for you to choose from. 4、Wear Resistance: The outdoor unit possesses anti oxidation and wear resistant, with rain cover, wall mounted installation is more convenient. 5、Work With Phone: The indoor display screen can support the connection of 5 mobile phone APP users, and it can monitor and unlock mobile phones. You can also communicate with them through the APP. Item Type: Video Doorbell Material: ABS, Acrylic, Aluminum Weight: Approx. 1086 g / 38.3 oz Color: Black Resolution: 1024 x 600 Outdoor Unit Camera: 1080P Camera: 1/4in CMOS Camera Lens: Approx. 3.6mm / 0.14in Camera Angle of View: 92° Call Duration: 120 seconds Monitoring Duration: 60 seconds Power Consumption: Static less than 0.5W, call less than 10W Product Size: Indoor Unit: Approx. 18.2 x 12.3 x 1.8cm / 7.2 x 4.8 x 0.7in Outdoor Unit: Approx. 15.5 x 10 x 5.4cm / 6.1 x 3.9 x 2.1in Memory Card Slot on the Back of Indoor Unit: Up to 32G memory card is supported (memory card is not provided for shipment) Unlocking Time: 10s Ringing Volume: 1 to 10 adjustable Ring Time: 5 to 45S adjustable Recording Time: 15 to 45S adjustable Use: Home, studio 1 x Power Adapter 1 x 5M 4 Core Cable 4 x Small Cable 11 x Screw 8 x Green Expansion Tube 1 x Black Accessory 1 x Manual 1 x Indoor Unit 1 x Outdoor Unit