UNWIRED TECHNOLOGY UC-500 Hands-Free Speaker/Microphone Easy-to-Install, Non-Permanent Clips discreetly to posts between seatback & headrest Circuit allows simultaneous speaking and listening for natural sound Large 36mm Speaker for superior sound with 2 16" Gooseneck Boom Microphone for sturdy yet flexible placement of mic near user Proprietary Ambient Noise Reducing ASIC (U