Specifications:The standard 3.5mm jack makes it compatible with smartphones, tablets, MP3 and almost all 3.5mm audio devices.Noise isolation technology and high-power dynamic speaker system provide excellent audio performance.The built-in microphone allows you to make and receive calls hands-free while exercising, which is very convenient and practical.This lightweight in-ear earphone uses a dual drivers design to make the mid and high frequencies more natural and the bass stronger.The in-ear design with sound insulation and isolation can block ambient noise and help you focus on listening pleasure.Item Name: Wired EarphonePlug: 3.5mmSpeaker Sensitivity: 108(dB)Impedance: 8 ohmAppearance Type: in-EarFrequency Response Range: 20Hz-20KHzMaterial: ABSFeatures: Built-in Microphone, with 3.5mm Jack, Noise Isolation Design, in-Ear, LightweightSize: 4cm x 4cm x 2cm/1.57" x 1.57" x 0.79" (Approx.)Cable Length: 120cm/47.24" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Wired Earphone