product description: The appearance of the door station is similar to the traditional optical cat's eye, and the hidden camera 2.8 inch TFT high-definition LCD screen, 320*240 300,000 professional security cameras, 90-degree wide-angle Power supply: 4PCS AAA dry batteries (not included in the package) Infrared night vision, Ding-dong doorbell, camera function The built-in 8M memory can store about 90 pictures, cyclic storage, no need to insert a card Ultra-long standby Minimalist design, easy to operate, plug and play Support door thickness: 35-120MM Door hole diameter: 14-22MM packing list: 1: Indoor host *1 2: Outdoor handset*1 3: Metal hanging board*1 4: Screw bag*1 5: English operation guide *1 Product packaging size and weight: Color box size：14.2*11.2*7cm (including color box) total weight：277g