This hardwired ceiling mount Smoke Detector Camera equipped with 1080P sensor with a 3.7mm lens which is perfect for overhead viewing with a 80 degree angle of view! It has a built-in microphone for listening in and it also has real functional smoke detector with built-in alarm sensor &buzzer. Great for store managers who wish to keep an eye on employee's from above, cash register exchanges & more! Best of all, because it looks like a regular smoke detector, you're able to place as many of these as you need in the areas you want covered. Automatically adjusts to light changes and is perfect for ceiling mounting.