Fully-enclosed dynamic in-ear headphone. SE-CL502. Sound: The adoption of an enclosed design reduces sound leakage and provides powerful bass reproduction. Driver Units: 9 mm, Frequency Response: 20-20.000 Hz, Impedance: 16 Ohm, Max. Input Power 100 mW, Sensitivity 100 dB, Plug: 3.5 mm 4P stereo mini-plug (gold), Cable Length: 1,2 m, Package including: Earphone tips (S/M/L), Conversion cord, Weight: 4 g, Color: Green