PLANTRONICS W440-M Office Wireless Headset Ear Coupling: Over the Ear Talk Time: Up to 7 hour(s) Operating Range: 300 Feet Specifications: Connects To PC and Mac via USB adapter Wireless Frequency DECT 6.0, range up to 300' (91.4 m) Audio Performance PC Wideband: Up to 6800 Hz Hearing Protection SoundGuard DIGITAL Protects against sound levels above 118 dBA; Anti-startle (detects and eliminates any large sudden increase in signal level) Time-Weighted Average Prevents average daily noise exposure level from exceeding 85 dBA Certifications UC Standard version built for UC applications and softphones from Avaya, Cisco, IBM, Skype and more Weight: 0.74 oz.
