Description:This KEENION KOS - E001 In-ear earphone provides for you with a secure， comfortable， noise-isolating fit while delivering clear and dynamic sound. It is suitable for most of the 3.5 mm interface of mobile phones， MP3， MP4 and other multimedia player use. Main Features:Noise-isolating and soft earphone1.2m cable length10 - 28KHz frenquency response28Ohm ± 15% impedanceSuitable for mobile phone， MP3， MP4， tablet PC and other devices with 3.5mm interface Specification:Model KOS-E001 Color Assorted Colors Wearing type In-Ear Specification Headset type Dynamic Connectivity Wired Connecting interface 3.5mm Application Portable Media Player， Mobile Phone， Computer Plug interface Full-sized Cable length 1.2m Driver unit 10mm Frequency response 18-20000Hz Sensitivity 110 ± 3dB Product weight 15 g Package weight 0.07 kg Product size (L x W x H) 120 x 2.2 x 1.2 cm / 47.2 x 0.9 x 0.5 inches Package size (L x W x H) 13 x 10.2 x 2.8 cm Package contents 1 x In-ear Earphone， 2 x Pair of Earbuds