*** DISCONTINUED *** All-in-One: Under the telephone accessory deck hosts Plantronics top-of-the-line A20 amplifier, cord management, DuoSet convertible headset, on-line indicator and headset stand. Easy Adjustment: Audible and visual cues simplify the adjustment of incoming and outgoing volume, tone control and mute DuoSet Headset: Convertible for either over-the-head or over-the-ear use with new conformable earhook Improved Sound Quality: Unique SoundGuard Plus and Call Clarity technologies for superior sound Easy Installation: Sets up in minutes with plug-and-play automatic configuration and seamless telephone integration Plantronics S20 Key Features: Plug and Play - Auto-configuration Audible and visual cues for easy adjustment Receive and transmit volume control Variable placement headset stand Tone-control Mute selector Adjustable accessory deck Connects to single- or multi-line corded phone Cord management Six foot corded On-line indicator Headset stand Quick Disconnect coil cable connects to all Plantornics H-series headset S20 This all-in-one solution delivers a call-center grade convertible noise canceling headset (H141N) with an under-the-telephone accessory deck amplifier (A20), cord manager, on-line indicator and headset stand. Features A20 M12 MSLP $150 $120 On-line Indicator Standard $25 AC/DC Power Standard $10 Headset Stand Standard N/A Sub Total $150 $155 Auto-Configuration Standard N/A Cable Management Standard N/A Transmit Volume Control Standard N/A Auto Lifter Optional N/A