Samson RH100 Open-Air Playback Headphones Headphone Type: Open Driver Size: 40mm, Plug Type: 1/8-inch to 1/4-inch adapter Fit Style: Circumaural, Cable Type: Straight Frequency Response: 20Hz-22kHz, Cord Length: Approximately 3 meters Impedance: 32 ohms, Weight: 1.05 pounds