[. . . ] The rugged lightweight headphones have a secure fit and can be used for both mobile sources and home (mini) hi-fi systems. [. . . ] When out and about, a convenient cord take-up lets you adjust the headphone cable to the required length. 18­18, 000 Hz (­ 3 dB/1 kHz) Transducer principle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . supra-aural Weight (without cable). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . approx. 3. 5 mm Ø stereo mini jack plug with adaptor to 1/4" (6. 3 mm) stereo jack plug Connection cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] 3. 5 mm Ø stereo mini jack plug with adaptor to 1/4" (6. 3 mm) stereo jack plug Connection cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]