Computer Headphones   Model Frequency Response Cord Length Distortion Mic Type Mic Operation Range CH-10 60Hz–20kHz 4.5 ft. N/A No Mic N/A CMH-200 60Hz–20kHz 8 ft. Less than 1.0% Noise-Cancelling condenser boom 100Hz–16kHz MH-500 30Hz–20kHz 8 ft. Less than 1.5% Noise-Cancelling condenser boom 60Hz–16kHz   Stereo Headphones   Model Frequency Response Cord Length Style Jack Included Weight Dimensions RH-1 20Hz–20kHz 8 ft. Open 1/4" and 1/8" 4.2 oz. 7.1" x 9.7" x 2.5" RH2b 20Hz–20kHz 8 ft. Closed 1/4" and 1/8" 6.3 oz. 7.25" x 10" x 4" RH3 20Hz–20kHz 8 ft. Closed 1/4" and 1/8" 8.8 oz. 7.5" x 10.2" x 2.5" RH5Ma 20Hz–20kHz 8 ft. Semi-closed 1/4" and 1/8" 5.8 oz. 7.5" x 10" x 3" See more product comparison charts