The SMK91204K is a security alarm camera powered by your existing 120V AC connection inside your ceiling or wall. The base is designed to be mounted on the ceiling by deafult. You are ask us to change the camera angle is you wish. The angle is aimed to shoot down and across the room at 45 Degrees to cover about 70-80% of the room. Ceiling corner placement is the best location. Center of a room placemnt may only catch 50% of the room. This security camera has a resolution of 4K or 4096 x 2160px. Video quality is very clear. A 32GB SD card will be included for video storage. This product is video only. There is no audio capability. No microphone. You can connect to the camera via your smartphone (iPhone or Android). Video is store on the SD card but can be accessed via phone app. Connect to your Wi-Fi network. View live video and play recorded video via phone.