Covert listening devices have been used for years in espionage and police investigations, but now you can use them in your own home or office. A covert listening device is the combination of a radio transmitter with a microphone attached or a completely self-contained recording device. Our smaller listening devices are useful for phone conversations or recording important meetings and lectures. Whether you need a listening device for some covert recording or just to avoid taking notes in class, Spy Tec has what you need. PLEASE remember covert recording of conversations that you are not a party to is illegal in most states. Check your local state law before recording conversations