The Hamilton Electronics HA-66USBSM starts with Hamilton's HA-66M headphone with built-in microphone and adds integrated USB Sound. Use these headphones with any USB-equipped computer.
USB 2.0 Compliant
Impedance: 32 Ohms
Frequency Response 20 - 20,000 Hz
Speaker drivers: 40mm Mylar
Headphone frequency response: 18 - 20 Hk
Microphone -Electret Condenser, Omnidirectional Pickup
Soft leatherette style washable ear cushions
Windows 7, Vista and XP Compatible (Latest service packs recommended)
Mac OSX Compatible (Latest updates recommended)
One (1) year warranty.