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Works directly in on the Cisco 7900 & 8900 series phones
Versatile headset converts from headband to over-the-ear style
Single earpiece (monaural) can be worn on either ear
The APP-51 is an electronic hook switch cord for use with Polycom SoundPoint IP telephones and Plantronics wireless headset solutions
Simple USB connectivity to your PC or detachable cable to take your mobile calls throughout the office
HP Poly Plantronics CS50 & CS55 Replacement Battery Jabra wireless accessories Works directly in on thepart #64399 01 Plantronics part# 65358 01 Rechargeable headset battery for the CS50, CS50 USB and the CS55 wireless units Poly SKU: 64399 03 Formerly 64399 01 Lithium Ion 190 Mah 3. 7 V DC