Systems and methods for operating a marker. The methods comprise: storing energy collected by an energy harvesting element of the marker; using the stored energy to enable operations of the marker's communications element; receiving, by the marker's communications element, a marker deactivation signal transmitted from an external device; and causing either a resonator to be prevented from receiving transmit bursts emitted from an EAS system, a bias element's magnetic field to be normalized, or a resonator to be physically prevented from vibrating, in response to the marker deactivation signal's reception.

Systems and methods for operating a marker. The method comprising: receiving, by a Radio Frequency Identification (RFID) element of the marker, an RFID deactivation signal transmitted from an external device; and responsive to the RFID deactivation signal, supplying power from the RFID element to a detuner element so that the detuner element switches from a first state to a second state. The marker's resonant frequency is changed to a first value that falls outside of an Electronic Article Surveillance (EAS) systems operating frequency range when the detuner element switches from the first state to the second state.

Systems and methods for operating a marker. The method comprising: receiving, by a Radio Frequency Identification (RFID) element of the marker, an RFID deactivation signal transmitted from an external device; and responsive to the RFID deactivation signal, supplying power from the RFID element to a detuner element so that the detuner element switches from a first state to a second state. The marker's resonant frequency is changed to a first value that falls outside of an Electronic Article Surveillance (EAS) systems operating frequency range when the detuner element switches from the first state to the second state.

A distance of an Electronic Article Surveillance (EAS) tag on an item from a scanner is determined when a code for the item is read by the scanner. When the distance is greater than a predefined distance, a delay period is initiated and when the delay period expires with the EAS tag not having been placed within the predefined distance from the scanner, an alert is raised to an operator of a Point-Of-Sale (POS) terminal.

A method for managing the reading of a barcode and deactivation of an EAS tag relative to an EAS effective range and a depth of field (DoF) of the scanner is described. A product may comprise a barcode and a co-located EAS tag. The method uses a distance sensing system to sense how far the product is located from the scanner front window. The method only outputs the decoded data of the barcode when the product is inside an EAS effective distance. When the product is inside the EAs effective distance, the EAS tag on the product is deactivated. When a customer leaves a store with the EAS tag deactivated, a store alarm may not sound. When the product is outside of the EAS effective distance, but inside the DoF, the decoded data of the barcode is discarded.

Systems and methods for operating a marker that involve receiving, by a Radio Frequency Identification (RFID) element of the marker, an RFID deactivation signal; and responsive to the RFID deactivation signal, supplying power to a detuner element of the marker so that the detuner element switches from a first state to a second state. The marker's resonant frequency is changed to a first value that falls outside of an Electronic Article Surveillance (EAS) systems operating frequency range when the detuner element switches from the first state to the second state.

A register system includes a handheld unit including a code scanner and a security tag signal reception unit and a processor. The processor is configured to determine whether or not a security tag on a product is deactivated based on whether or not the security tag signal reception unit receives a security tag signal from the product during scanning of a product code on the product, and register the product code for a transaction when the security tag is determined to be deactivated.