The Hamilton Electronics HA2USBM starts with Hamilton's HA-2M headphone with built-in microphone and adds integrated USB Sound. Use these headphones with any USB-equipped computer, even one without a sound card!

Built with kid's health and safety in mind, these headphones are designed to combat the spread of head lice in schools. Each headphone comes in its own heavy-duty, write-on, reclosable bag. When sealed in the bag, lice is killed in 24-48 hours without the use of chemicals.

Specifications:

• Built-in boom microphone
• USB 2.0 Compliant
• Exclusive XearTM Software for reproduction of CD Sound
• Virtual Dolby 5.1 CH Effects
• Compatible with Windows 7, 8 and XP (Latest service packs recommended)
• Impedance: 170 Ohms 
• Frequency response: 18-20k Hz 
• Cord: 2 meters 
• Speaker drivers: 40mm Cobalt magnet type
• Weight: 5 Ounces 
• One (1) year warranty.