Specifications: With a 3.5mm standard jack design, it is compatible with smartphones, tablets, MP3 and almost all 3.5mm audio devices. The headphones have noise isolation technology, and the high-powe more→r dynamic speaker system provides excellent audio performance, allowing you to enjoy the world of music. It is very durable, so you don't have to worry about running out of power. 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 can block ambient noise and help you focus on listening pleasure. Item Name: Wired Earphone Product Interface: 3.5mm Microphone: No Frequency