Noise-isolating in-ear stereo earbuds; Soft memory-foam earpads create custom fit and enhance bass and treble clarity; Frequency response performance delivers the full Koss(R) high-fidelity sound; Freq response: 10 Hz to 20 kHz; Impedance: 16 ohms; Sensitivity: 112 dB SPL; 4 ft. cord with 3.5 mm plug; White;