Sennheiser APP1 Two Prong Adapter (009911)

Two prong adapter suitable for following headsets: SH 230, SH 230 IP (USB), SH 250, SH 300, SH 330, SH 330 IP, SH 335, SH 350, SH 350 IP, CC 510, CC 520, CC 520 IP, CC 530, CC 540, CC 550, CC 550 IP, CC 515, CC 515 IP, HME 280-DW 800i, SC 230, SC 260, SC 232, SC 262.