Two drivers - These headphones have two ( 10 + 8 mm speaker) balanced armatures. Together they provides an extremely accurate listening experience with unsurpassed dynamic power and clarity from deep bass to sizzling highs. Convenient ergonomic design - The shape natural ear fittings naturally match your ear canals. 3 sets of included ear tip sizes ensure a proper fit for all. They're more convenient and less likely to fall out, freeing you to enjoy your music. In-line microphone with control - wired earphones features an in-line microphone which enables easy receiving of calls or undeterred sessions of musical extravaganza. Easily take calls and manage your music on any smart device and loudness control. Multi-function button and universal compatibility and loudness control button - Answer or end calls, activate voice control, skip tracks. With the stylish design and high-end sound quality, qkz ck-8 earbuds are compatible with the latest generations of ipod, iphone, and ipad. They work with all androids, tablets, MP3 players, and related devices with a standard 3.5 mm jack.