Poly Savi 8420 Office Stereo DECT 1920-1930 MHz Headset TAAPoly Savi 8420 Office Stereo DECT Headset 1920 1930 MHz TAA Upgrade your office communications with the Poly Savi 8420 Office Stereo DECT Headset. Engineered for todays multi device workspaces, the 8420 delivers clear, natural sound across desk phones, PCs, and mobile devices. The stereo design provides immersive sound for calls and multimedia, while the ultra lightweight, behind the ear style and plush ear cushions keep you comfortable through back