SpecificationDriver: 5mmSensitivity: 103+ / -3dB Frequency: 20-20kHz Impedance: 16 ohm Plug: 3.5mm Plug Cord Length: 120mm Microphone: talk play pause music for most smart cell phones and skip music function for iphone series and iPod Ear house: Soft SiliconeFor this kind mini earbuds , which is our unique patent headphones , the selling hits is the whole silicone house could insert your ear comfortable without falling out trouble,greatly reduce the noise and provide all-day comfort, the ear buds fit gently and safely in the ears, offering secure placement and long-lasting comfort. Weighing almost nothing ... What's more , the mini 5 mm driver offer you crystal crisp sound for most music , the mini microphone suitable for most smartphones and sensitive to talk and skip to choose the music for iphone, ipad, audiobooks...would be the fashion easy sport choice for you Make Calls Hands-Free Equipped with a built-in microphone, the in-ear sleeping/sport headphones can be used for hands-free phone calls, making it possible to effortlessly chat with a friend while you are busy one other things. Simply plug the headphones into your cell phone, and you're all set to converse--hands free. Are You the One Need Music to Fall Asleep? If you happened the one need fall asleep to music, this is the unique earphone you can¡¯t miss, this kind headphone with the most comfortable ergonomic ear tip design, adopted high quality super soft silicone, you can easily relax on your side, head on the pillow, and no feeling the pressure and pain into ears when normal headsets might be too large or bothersome. Really the sleep and travel hit for you ! TipsFor this headphone, which are made of total silicone, so we match the durable zipper case for protecting it, please store it in the zipper case when you don¡¯t use it to ensure the uselife.