For removal of the protective properties from acoustomagnetic radio frequency labels used for protection of goods in shops and supermarkets from theft, are used deactivators. This device consists of a panel on which is placed a security label for deactivation and electronic unit. Only after the cashier deactivates anti-theft label, the goods can be brought outside of the trading halls. Different models of deactivators may vary in distance of deactivation, which is a very important feature, as well as some deactivators have additional audible alarm.