All Koss® and Panasonic® headphones

Koss HB-70 Wireless Headphones
Wireless (Cordless), Consumer, Stereo, Behind the Head, 30 Hz - 15 kHz, 10000 ohm, Battery Life: Up to 30 Hours, Weight: 4.5 oz. (127.6 g)

Panasonic RP-HC200 Headphones
Cable (Corded), 4.92 ft. (1.5 m), Consumer, Stereo, 1000 mW, Over the Head, 10 Hz - 21 kHz, 330 ohm, 91 dB, Weight: 5.54 oz. (157.1 g)

Koss UR55 Headphones
Cable (Corded), 3.94 ft. (1.2 m), Professional, Stereo, Over the Head, 18 Hz - 22 kHz, 36 ohm, 100 dB

Koss RUK30 Headphones
15 Hz, 16 ohm

Koss Portapro Headphones
Koss Porta Pro. Ear coupling supraaural, Headphone frequency 15 - 20000 Hz, Headphone sensitivity 101 dB.

Koss PRO4AA Headphones
Cable (Corded), 10 ft. (3.05 m), Consumer, Stereo, Over the Head, 10 Hz - 25 kHz, 250 ohm, 95 dB, Weight: 21 oz. (595.4 g)

Panasonic RP-HTX7P-R Headphones
Cable (Corded), 47 ft. (14.33 m), Consumer, Stereo, 1000 mW, Over the Head, 7 Hz - 22 kHz, 40 ohm, 99 dB, Weight: 0.43 oz. (12.2 g)

Koss RUK50p Headphones
Cable (Corded), 4 ft. (1.22 m), Consumer, Stereo, Over the Head, 20 Hz, 32 ohm, 99 dB, Weight: 8.5 oz. (241 g)

Koss RUK50 Headphones
Cable (Corded), Consumer, Stereo, Behind the Head, 32 ohm, Weight: 8.48 oz. (240.4 g)

Koss TUGO Wireless Headphones
Wireless (Cordless), Professional, Stereo, Over the Head, Battery Life: Up to 10 Hours

Koss KDX-200 Headphones
Cable (Corded), 4 ft. (1.22 m), Stereo, Ear Buds, 15 Hz - 20 kHz, 16 ohm, 100 dB, Weight: 1 oz. (28.4 g)

Panasonic RP-HTX7-K1 Headphones
Stereo, Over the Head, 40 ohm

Koss KDX-100 Headphones
Cable (Corded), 4 ft. (1.22 m), Consumer, Stereo, Ear Buds, 10 Hz - 20 kHz, 16 ohm, 112 dB

Koss UR-30 Headphones
Cable (Corded), 8 ft. (2.44 m), Professional, Stereo, Over the Head, 18 Hz - 20 kHz, 100 ohm, 101 dB, Weight: 12 oz. (340.2 g)

Koss MV1 Headphones
Cable (Corded), 8 ft. (2.44 m), Professional, Stereo, Over the Head, 10 Hz - 25 kHz, 250 ohm

Koss Cc01 Headphones
Cable (Corded), 4 ft. (1.22 m), Consumer, Stereo, Ear Buds, 10 Hz - 20 kHz, 16 ohm, 108 dB, Weight: 11 oz. (311.8 g)

Panasonic RP-HTF600 Headphones
Cable (Corded), Stereo, 1500 mW, Over the Head, 10 Hz - 27 kHz, 56 ohm

Panasonic RP-DJS400 Headphones
Cable (Corded), 3.9 ft. (1.19 m), Consumer, Stereo, 1000 mW, Over the Head, 10 Hz - 27 kHz, 32 ohm, 102 dB, Weight: 4.8 oz. (136.1 g)

Panasonic RP-HJE450 Headphones
Cable (Corded), 4.3 ft. (1.31 m), Consumer, Stereo, 200 mW, Ear Buds, 6 Hz - 26 kHz, 16 ohm, 102 dB, Weight: 0.14 oz. (4 g)

Koss HQ1 Headphones
Cable (Corded), 8 ft. (2.44 m), Consumer, Stereo, Over the Head, 20 Hz - 20 kHz, 32 ohm, 93 dB, Weight: 10.2 oz. (289.2 g)