This is a special order item and may take 2-4 weeks to ship from the Manufacturer. The AT3M Headset Amplifier is a telephone amplifier from GN Netcom for phone systems requiring a PJ 327 plug prong interface. It is a unique product that offers a field replaceable headset cord and a 90-degree bend to minimize space and position the controls for easy access. Additionally, it includes full range volume control, voice switching to further reduce background noise when the agent is not speaking. Failsafe Compression ensures constant speaker output, the circuit precisely intercepts acoustic spikes.