[One-year Worry-free ][24-hour customer support team online][Email Contact] We strives to providing Perfect Items and 5 Stars Service. Features: 1. Ergonomic in ear design pumps out the deepest bass, soaring highs, and ultra-clear mid range 2. Lightweight design is ideal for listening when exercise, travel, or for everyday wear 3. Hard chrome earphone finishes for rugged durability and everlasting shine 4. Built-in mic lets you talk hands-free on your smart phone device 5. Also works with online voice and video chats on smart phone 6. Sealed in-ear construction and multiple ear tip designs block out external noise. Controlling Audio Tracks: Last track: Three-click the Multi-function Button. Next track: Double-click the Multi-function Button. Pausing Track: Press the Multi-function Button to pause.