Jayfi D2 Earphones, Dual Driver Earbuds, Stereo Bass Noise Isolating In-Ear Headphones with Mic Matte Black Dual Drivers Design and High Resolution D2 adopt two voice unit with a diameter of 6.8mm and professional frequency division technology developed by Jayfi. The division of dual drivers, delivering low frequency and high frequency respectively, enables high resolution and broad sound field and presents exquisite details of music. Zinc Alloy + ABS Frosted Material Integrated Housing Zinc alloy makes the housing solid and the earphones durable. ABS frosted material improves the wearing comfort. Ergonomic Design and Noise Reduction The cavity structure is in line with the shape of human ear so that the headphones are snug-fit and not easy to fall. And there are three different sizes of silicone earbuds for selection. The perfect fit well isolate the noises of external environment. Tangle-free TPE Material The cable is made of TPE material, soft, durable and tangle-free. It also ensures the high quality audio output. REMOTE CONTROL COMPATIBLE SYSTEM: ANDROID Windows Phone iOS. 1 YEAR WARRANTY