If I were a cat burglar knocking off houses during the day I’d probably wanna ring the doorbell and see if anyone is home before committing my B&E. If your line of work happens to be such, you better watch out for the Wireless Doorbell Monitor With Camera. A small lens embedded in the door bell is activated and records to a built-in SD card whenever the bell is rung, thus recording your ugly mug. And the camera ain’t half bad, boasting a 2 megapixel sensor with a 1 Lux minimum rating. Just don’t forget to put in fresh AAA batteries now and again.
Oh, and there is an actual wireless digital door bell included that is good for up to 30 meters.
You can grab one for $41.