Moving coil bilateral in-ear earplugs、 whole white、 optical fiber green glow. The maximum power: 20MW. 3.5mm plug. With microphone. LED flashing. Built-in 120 mAh lithium-ion polymer battery、 continuous work more than 20 h、 charge and discharge in 300-500 times. Micro USB charging connector、 charging for at least 2 hours when first charging. When playing music、 flashing LED optical fiber with the music rhythm must first line will switch to the ON position、 and then insert the headset equipment to achieve synchronous flash). Line switch to A position and hold for 3 seconds、 the LED optical fiber Chang Liang、 dial to the OFF position、 close the LED. Line switch can control answer hang up calls、 pause and respond to music play - avoid headphones fiber line can be folded in half and effect or damage to the fiber.