Dimension (L x W x H): 17.00 x 13.00 x 5.00 cm / 6.69 x 5.12 x 1.97 inches Magnetic fixed design . Anti-slip wearing. Built-in high rate decoding chips, transfer music at high magnification code rate and stable high speed. HiFi live music, like being present on the different music scenes. Simple and visual on-cord control button, easy to operate, switch song, adjust volume and answer calls at any time, convenient and fast.