We finally tried the Plantronics CS-55 Dect 6.0 Digital Wireless Office Headset and it is AWESOME! We were using Plantronics CS50 headsets and they just give off feeback and crackle.The Plantronics CS-55 Dect 6.0 Digital Wireless Office Headset is really great, good sound quality, no feedback, no buzzing in your ear! And people can actually hear you!We have 7 wireless headsets working in our office and 2 are the CS-55. Once the CS50 ones break (which will be soon) I will be replacing them all with the CS-55!