全新未開封 Cisco 耳機 型號：CP-HS-W-521-USB= 廠商說明資料 https://www.cisco.com/c/ja_jp/products/collateral/collaboration-endpoints/headset-500-series/headset-521-522-ds.html#%E8%A3%BD%E5%93%81%E4%BB%95%E6%A7%9D