HP Poly Plantronics CS50 & CS55 Replacement Battery Jabra wireless accessories Single earpiece (monaural) can be

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

Works directly in on the Cisco 7900 & 8900 series phones

Versatile headset converts from headband to over-the-ear style

Includes velvet sleeve

HP Poly Plantronics CS50 & CS55 Replacement Battery Jabra wireless accessories Single earpiece (monaural) can bepart #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