Marc Ecko Unltd EKU-MTN-RD Motion Over-the-Ear Headphones (Red) Noise-reduction stereo headphones with Motion bass Compact folding construction and lightweight frame 40mm speaker diameter Frequency response: 20Hz-20kHz 1.25m cable with 3.5mm plug and includes a satin carry bag Connectivity technology : Wired Foldable Construction Stereo Headphones with Noise Reduction 40 mm speaker 32 OHMS Impendance 3.5mm Plug and 1.2M cable