product description: The appearance of the door station is similar to the traditional optical cat's eye, and the hidden camera 3-inch high-definition display, resolution 960*240 1 million professional security cameras, 100-degree wide-angle Power supply: 3PCS AAA dry battery (not included in the package)/5V1A power adapter (micro USB interface) The built-in 4M memory can store about 30 pictures, cyclic storage, and a maximum 32G memory card can be inserted Ultra-long standby Minimalist design, easy to operate, plug and play Support door aperture 14-22MM Support door thickness 35-110MM 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：192*119*38mm (including color box) total weight:253g