This set of wireless headphones operates on a 900 MHz radio frequency which gives you the ability to roam around all over your home or office without losing the signal. It uses two AA batteries which will give you approximately 25 hours of use.

This set of wireless headphones sells for as much as $185 but is available at Amazon.com for $116 with free shipping. If you're looking to spend approximately $180 on a set of headphones a better choice might be the Sennheiser RS 130 but with the lower price on Amazon the Koss JR 170 may be worth considering.

Koss JR 170 - Headphones ( ear-cup ) - wireless - radio

This small, lightweight pair of wireless headphones uses an infrared transmitter to send a signal to the headset which then reproduces the audio signal.

The infrared transmitter is a "line of sight" transmitter so you need to be in the same room as the transmitter unlike headphones that use a radio frequency which allows you more freedom to wander around while still listening to your audio.

This headset is light weight which is nice. The Koss HB79 uses two AAA batteries and costs approximately $38.

Koss HB79 Stereophone System Wireless