The Specs

Additional Specifications
Diameter (Speaker Element) 1.57"
Green Compliance RoHS
Quick Glance
Headphone Type Over-the-head
Type of Wireless RF
Warranty
Warranty Information 2 Year Limited
Wireless
Wireless Transmitter Range 40 ft
More Info
URL http://www.logitech.com
Performance
Overall Min Frequency Response 20 Hz
Overall Max Frequency Response 20 kHz

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