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 Model : KOS-E001 Color : Assorted Colors Wearing type : In-Ear Function : Noise Cancelling Headset type: Dynamic Connectivity : Wired Connecting interface : 3.5mm Application : Portable Media Player, Computer, Mobile Phone Plug interface: Full-sized Cable length : 1.2m Driver unit: 10mm Frequency response : 18-20000Hz Sensitivity : 110 ± 3dB Package weight: 0.096 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