Check the listing for details. Plantronics Amplifier Model M12 P/N 43596-01 NOS. Condition: New. Listed at 22.46 USD. You are bidding on: Plantronics Amplifier Model M12 P/N 43596-01 NOSNew in original box. Box shows wear. Does not come with batteries. (x2 AA)***********************Connects Plantronics headsets to any modular single or multi-line phoneOffers ergonomically designed volume, headset/handset, & mute controlsEasy to installEasy to operateOccupies very little desk spaceReceives & transmits volume controlHeadset/Handset selectorFor use with Plantronics H Series HeadsetsReduces background noise interferenceSeparate controls allow adjustment of outgoing & incoming volumeSupport Wideband Audio when paired with VoIP phonesAdvanced Echo Management for echo reductionPowered by 2 AA batteries or an external power adapter*********************************************************PLEASE READ: I buy mostly estates, close outs, shelf pulls, and auction items. As the history of the item is not always known. I will describe all of my items listed to the best of my ability, if there are any flaws to the item it will be noted in the listing and photos of the flaw shown. At times I may miss a flaw, as I am only human. Please contact me and I will make it right and make sure that you are happy with you interaction and purchase from Big Man Tim's Treasures. Please see all photos and ask any questions BEFORE purchasing. "FREE SHIPPING"Love this item? Check out the other Sporting Good items in my Ebay store!Please check back on a regular basis, as we list new items daily!!HAPPY BIDDING!041322/EP Warehouse