This peephole viewer comes with a 2.8 inch large LCD high resolution screen monitor to offer clear video, you just need to purchase 3pcs AA 5V batteries to power it on. Easy installation with the attached screws and bracket, no wires are required. Especially convenient for children and elderly. An excellent door peehole camera monitor to ensure your home security. Featrues - 2.8 inch large LED color high resolution screen, high definition 20 degree wide viewing angle lens provide you clear video in a wide range. - Support night , equipped with 4 IR LEDs for night version, LED turns on automatically and provide clear sight at dark condition. - There are 32 ring tones for doorbell ringing choosing. - Conveient power supply. Just need to purchase 3pcs AA batteries (not included) to power it on. - Easy and clearly to use and recognize . Especially convenient for the children and the elderly. - Easy installation with the attached screws and bracket, no wires are required. An excellent door peehole camera monitor to ensure your home security. - Low vplatage indicator. When the voltage is low, the power will with the sound drip, dtip... Specification - ColorAssorted Color - Material: Metal. - Screen: 2.8 inch TFT LED color screen - Door hole diameter: 14-35 mm - Door thickness: 35-100 mm - Product size: About 14.60X8.20X1.80cm/5.74X3.22X0.71in - Sensors: CMOS with mihara digital sensor - Zoom:3 times digital zoom - Micro slot: supports up to 32 GB - Power: 3pcs AA batteries Package list: 1 x WiFi Video Doorbell 1 x x Mounting Screw Set 1 x User Manual