Item Type: Video Intercom Doorbell Material: ABS, Aluminum Gross Weight: 1246g / 44.0oz Power Input: AC 100V-240V 50Hz 60Hz Product Size: indoor unit: Approx.23 x 16.5cm / 9.1 x 6.5in, outdoor unit: Approx.15.5 x 10cm / 6.1 x 3.9in Machine Current: less than 500mA Call Delay Time: 120S10% Monitoring Delay Time: 60S10% Lens: 3.6mm 92 degrees, outdoor unit with infrared night vision function Outdoor Installation: Wall mounted, embedded optional Scope: Suitable for luxury villas, home furnishing, office buildings, hotels, guesthouses and other places Package List 1 x Indoor Unit 1 x Outdoor Unit 10 x Screw 1 x Black Accessory 8 x Green Expansion Tube 5 x Colored Wire 1 x White Wire 1 x Power Plug 1 x English Manual 1LCD Display: This smart electronic doorbell uses a TFT LCD display, which has no radiation, low power consumption, HD widescreen images. 2Video Intercom Function: With call, outdoor monitoring, intercom, electronic control lock, hands free, indoor two way intercom function, do not disturb. 3Beautiful and Practical: Oxidation and wear resistant surface treatment of outdoor unit, ultra thin indoor design, aluminum plate, electroplating buttons, beautiful and luxurious. 412 Bells: 12 kinds of ringtones are optional, you will not always hear the monotonous doorbell, the image brightness, color and volume OSD menu adjustment. Outdoor unit infrared night vision function, easy to install on the wall. 5How to Use: According to the doorbell outside the door of the visitor, the image will be automatically opened indoors, according to the indoor response key to talk to the visitor, touch the unlock button, the electric control lock will automatically open, no longer run to open the door, usually standby, press the monitor button, you can monitor external environment.