Polycom Vortex EF2241 Automatic Mic or Matrix Mixer - Tested Working

Used Polycom Vortex EF2241 Microphone Matrix Mixer 4 Channel

Polycom Vortex EF2280 8-Channel Mixer and Noise Cancellation with Power Supply

Vortex EF2241 Polycom 2201-12241-601

Polycom Vortex EF2241 Microphone Matrix Mixer 4 Channel

Polycom Vortex 4 Channel Audio Mixer EF2241

Polycom SoundStation 2W Conference Phone w/ Mics 2201-67800-022 UNTESTED

POLYCOM Tabletop Microphone P/N: 2201-09750-002 (Includes 7.6m Cable)