Koss Cobalt Bluetooth Wireless Stereophone ): 7 1/16 x 6

): 7 1/16 x 6 3/8 x 7 61/64

Textile Material: 100

Cover unzips for easy machine washing

Adjustable 20" to 22" draw length

Koss Cobalt Bluetooth Wireless Stereophone ): 7 1/16 x 6The Koss Cobalt Bluetooth Wireless Stereophone allows complete wireless freedom plus the Full Sound of Koss. The Cobalt uses frequency hopping technology for interface free audio. 30 foot range allows you to move freely while taking a call or listening to your favorite music or movies. The Cobalt is also sold with a USB dongle transmitter, allowing you to plug into your computer. The Cobalt has an approximate battery life of 8 hours. It can be used