The SenTech 58 kHz Acousto-Magnetic door frame mounted transceiver antenna will protect openings up to 6 feet (1.83cm) using standard AM tags and Labels. Additional receivers and or transceivers may be added to expand coverage. It’s fully programable utilizing advanced circuitry and software. Standard features include internal audio and bi-directional people counter with analytical data output, remote diagnostics and tuning capability via TCP/IP.