Tonicstar Earbuds Earhooks (Metal Blue) Built-in Microphone, convenient hands-free calling, answer, reject and end calls directly with the earphones. Slide the volume button to control the music volume. Stereo surround sound gives you excellent sound performance, delivering deep bass and crystal treble. Built-in speakers enable you to make high quality conversations even in a noisy place. Flat wire, in order to prevent tangle, is added in this pair of earphones, more convenient to carry in your bag or pocket, easy to enjoy music whenever you want. There are three sizes of ear tips including S/M/L to make sure the best fit. In-line control enables you to adjust the volume and make music playing easy. You can also pick up calls or play music directly from the control. Compatible with all 3.5mm audio cable jack smartphones and devices, including the full range of apple iPhones, iPads, Pods, Samsung Galaxy and Note Series, Game console, MP3 and MP4 music players, Nexus, HTC, laptops, tablets, PC and more.