Feature: 1. With micro memory card slot, support 32GB memory card (not included). There are 4 infrared LED lights, LED backlight automatically on. 2. Support picture and video display date and time function. 4pcs AAA batteries (not included) power supply, support low voltage alarm. 3. 2.8‑inch Super bright LCD screen, clear and smoothly image or video display, and take a 10‑second video when there are guests outside. 4. Easy installation and operation, no need for special tools, save time and effort, 24‑hour security monitoring to protect you and your family day and night. 5. 0.3MP High definition camera, used for high‑definition picture photography and video recording, timely and clear to record tourist information. Specification: Item Type: Door Viewer Material: Plastic + electronic components Display: 2.8-inch LCD screen Image Sensor: 1.3 Megapixels Visual Angle: 120 degrees Power Supply: 4pcs AAA battery (not included) Memory Card: Support up to 32GB (not included) Tones: 3 Languages: 12 Lights: 4 Applicable Door Hole: Approx. 15 ~ 60mm / 0.6 ~ 2.4in Applicable Door Thickness: Approx. 40 ~ 100mm / 1.6 ~ 3.9in Indoor Door Viewer Size: Approx. 110 x 74 x 17mm / 4.3 x 2.9 x 0.7in Outdoor Door Viewer Diameter: Approx. 65mm / 2.6in Features: Photo/video. Package List: 1 x Display Screen 1 x Camera 1 x Manual 6 x Install Buckle 1 x Install Rack