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
Cisco Headset 562, Wireless Dual On-Ear DECT Headset with Multi-Source Base for US & Canada, Charcoal, 1-Year Limited Liability Warranty (CP-HS-WL-562-M-US=)