Characteristics: LCD Display: The 2,8 inch display allows you to depict the faces of guests. It is more practical and more practical. Photos taken: When a guest presses the do door, the hosts ring and turn on the LCD screen to take a picture. Enable do access "access key" to access. Online guest registration. Screen supporting power display. Built-in memory: With the included memory stored in its entirety, without the need for memory cards. Wide viewing angle: The 90-degree wide-angle lens allows for additional images without any other friends available. More Features: Supports viewing photos, on status settings, deleting guest records. Technical data: Model Number: DD1 Display: 2,8 inch LCD screen LCD Resolution: 320*240p Pixels: 0,3 MP Infrared lights: 2 pcs, 850 nm Memory: Built-in cyclic memory Door thickness: 35 mm-120 mm mounting hole Size: 14-22mm Color: Gold Host Size: 12,7 * 6,9 * 1,8 cm / 5 * 2,71 * 0,70 inch Host Weight (Without Battery): 67 g/2,34 oz Visionary size: φ5,8*1,3 cm/φ2,28*0,51 inch Image Weight: 27 g/0,94 oz Package Size: Approx. 14,4*11,2*6,9 cm/5,67*4,41*2,71 inch Package weight: approx. 235 g/8,27 oz When no one is ringing behind the door, the owner must click in the middle of the screen to check the data under the door List of ingredients: 1 * Internal Host 1 * camera with image 1 * wore a screw 1 * Bracket 1 * User Manual (English/Chinese)