MMRM Magnetic 3.5mm Piston Design Earphones Headphones Wire Control Headset with Mic (White) For i/OS Devices:Compatible with i/os phones ,support play,answer, not support volume control. For Android Devices: Compatible with Most Android phones ( Not All), support play,answer,volume control. Piston design, effectively reducing the adverse impact of the cavity resonance timbre, leading to better bass performance. The wired headphones are secure in your ears and rest comfortably in the ear canal even you are running, jogging, walking, gym training, hiking, or other sports Package Includes: 1 x Piston Earphone (with original packaging)