The AT3M Headset Amplifier is a telephone amplifier from Jabra 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? 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.

A GN Quick Disconnect (QD) cord is included in the box.

Features at a glance:

A2DP for music playing: No. This device does not support Advanced Audio Distribution Profile (A2DP)
Auto Pairing: No. This device does not support Auto Pairing
Digital Signal Processing: No. This device does not utilize DSP (Digital Signal Processing)
Usage: Works with traditional desk phones. Connects to a PC and can be used to stream music/sound and for voice calls
Digital Signal Processing: No. This device does not utilize DSP (Digital Signal Processing)
Microphone Mute Function: Yes. Mute gives you the option to mute/unmute the microphone directly on the device
Jabra Direct: No. 
Setup Display: No.