Poly Savi 8220 UC Wireless Headset Standard USB-A (Microsoft) (Poly 209214-01 or HP 77Y82AA) Accessories SoundGuard technology protects hearing against

SoundGuard technology protects hearing against sounds above 118 dBA

This part will not function without a charging base and cradle

the Boom VISTA ensures clear

enhanced digital signal processing (DSP)

Time-Weighted Average prevents average sound level from exceeding 85dBA

Poly Savi 8220 UC Wireless Headset Standard USB-A (Microsoft) (Poly 209214-01 or HP 77Y82AA) Accessories SoundGuard technology protects hearing againstSavi 8220 Dual Ear DECT Wireless Headset Headset for Computers & IP Phones with USB ports Active Noise Canceling (ANC) helps you hear better Noise cancelling microphone reduces your background noise Business grade headset weighing 160 grams Impressive 590 feet of range 13 hours of talk time