Cisco Headset 531 Wired Single, USBA - CP-HS-W-531-USBA= - 888VoIP
Amazon.com: Cisco Headset 561, Wireless Single On-Ear Digital Enhanced Cordless Telecommunications Headset with Standard Base for US & Canada, Charcoal, 1-Year Limited Liability Warranty (CP-HS-WL-561-S-US=) : Electronics