Description:Features: 2.4-Inch LCD Screen: 2.4-inch LCD screen can monitor the outside through the indoor unit, can take pictures and store, and has its own memory. Door Viewer: Outdoor Host looks similar to traditional optical cats eye, built-in invisible camera, anti-theft, anti-pick, anti-cats eye peeping, 90 degree wide-angle field of view allows you to see more. Infrared Night Vision: With the help of 2 IR-LEDs, you can clearly see the outside even in a dark environment, making you feel safe. Automatically Taking Photos: Press doorbell key, the device will power on and take photos. You can also take photos inside house when you see someone specious outside the door. USB Rechargeable: Built-in 600mAh battery and easily charged by USB. With low power consumption and long standby time in energy-saving. Specifications: Type: Electronic Door Viewer Material: ABS Color: Black Size: About Indoor Host(L*W*H): 80x80x16mm/3.15x3.15x0.63inch Outdoor Host(D*H): 32x7mm/1.26x0.28inch Applicable Door Hole Diameter: 14-28mm/0.55x1.1inch Applicable Door Thickness: 35-120mm/1.38-4.72inch Power by: 1 x 600mAh Rechargeable Battery(built in) Vision Angle: 90 Degree Camera: 300,000 Pixels Resolution: 320*240 Storage Method: Built-In Memory, Cyclic Storage Package Included: 1pc x Indoor Host 1pc x Outdoor Host 1pc x Charging Cable 1pc x Metal Hanging Board 1bag x Screw 1pc x English Manual Note: 1. Due to the light and screen difference, the items color may be slightly different from the pictures. 2. Please allow 0.5-2 cm differences due to manual measurement.