Features 1、Excellent Zinc Alloy Material: This digital peephole viewer is made of excellent zinc alloy material, which is sturdy and durable, and can effectively prevent illegal prying and snooping, and guard the security of your home. 2、Super Wide Angle Lens: This electronic peephole camera doorbell has a super large wide angle lens that can cover a wider surveillance area while providing super HD video quality with details clearly visible. 3、Audible Surveillance Function: This camera door viewer has an audible surveillance function, which can hear the voice in real time and automatically catch and record when a visitor appears, providing all around surveillance guard. 4、Safe And Reliable: This peephole viewer door camera is designed to be pry resistant and has a variety of functions to comprehensively guard the safety of your home, so that you can rest assured that you are at home. 5、Wide Application: This eye electronic peephole doorbell has a wide range of applications and can be used in homes, apartments, villas and studios, etc. Specifications Item Type: Electronic Peephole Camera Doorbell Material: Zinc Alloy Battery: Built In 1200mah Polymer Lithium Battery (Included) View Angle: 160° Screen: 2.4 Inch TFT Color Screen, Resolution 240 x 320 Monitor outside through indoor unit. Built in 4M memory, supports taking photos without memory card (Not Included). Supports USB interface. Supports Door Hole Diameter: Approx. 15-25mm/0.59-0.98in, Support Door Thickness: Approx. 35-110mm/1.38-4.33in Weight: Approx. 291.00g / 10.26oz Package List 1 x Screen 1 x Peephole 1 x USB Data Cable 1 x Manual 1 x Gasket 10 x Screws 2 x Washers