Do you use Plantronics ‘H Series’ headsets and want some extra amplification? Then this is the cable you need. The A10-11 bottom cable is a simple plug and play device that will increase the amplification quantity of ‘H Series’ headsets to the higher Polaris level. Easy To Use The cable will connect all Plantronics corded headsets to compatible phones, is lightweight and simple to use. How It Works The A10-11 has a bigger capacity than other bottom cables. This allows more, i.e. amplified, sound to be transmitted through the cable to the headset. Features Amplifies sound to H Series headsets Plug and play functionality Hard-wearing coiled cable Made with Plantronics reliability