The calculator has a cool silver finish, and is fully functional so no one will suspect just what it is being used for. The kit comes complete with a receiver, so you can be listening into what is being said even though you are totally out of sight.

Just put it in a room and it will pick up whatever conversation is taking place, and transmit it to your receiver with earphones at distances up to 100 feet away.

This really is great value, as the calculator on its own is worth around £15.

A note of warning: You may not like what you hear - the truth can hurt!! You use this product at your own risk.

2 9V Batteries Required (included).