Bluedio T3 Extra Bass Bluetooth Headphones On Ear with Mic, 57mm Driver Folding Wireless Headset, Wired and Wireless Headphones for Cell Phone/TV/PC Gift (Black) NOTE: Original Bluedio T3 Bluetooth Headphones sold by" Bluedio".Zn ALLOY BODY, DURABLE AND STRONGQuality build that guarantees longevity. Built with an alloy frame, which allows these headphones to be super durable and strong. 57mm TITANIZING DIAPHRAGM, DYNAMIC SOUND & 3D SOUND EFFECT57mm Titanizing diaphragm ensures quicker transient response to electrical signals and enhanced overall sound performance, delivers dynamic sound, powerful extra bass. You can hear every beat every word. Simply turn on the 3D sound to immerse yourself in the stereo surround sound effect and to let your ears enjoy the stirring rock concert. NEVER POWER OFF, WIRELESS & WIRED HEADPHONES1. The wireless mode: Battery up to 20-hr music time/ talking time in a single charge; 2. The Wired mode with 3.5mm audio cable: you can also use it as a wired headphone with the provided audio cable so the headphones will never power off. MEMORY SOFT FOAM EARMUFFSThe ear cups of T3 are padded with memory foam which is rich in protein. It is very soft and ventilated. All we want to do is to bring you comfort, to protect your ears and give you a new feeling of wearing. FOLDABLE DESIGN, SAVE MORE SPACEWe especially strengthen the telescopic arm to ensure that it can bear over 5 thousand times stretching and bending. The foldable design makes it very convenient and portable. Wherever you go, you can enjoy your favorite music anytime.Gentle Reminder: To get both audio and wearing comfort, please take off the headphone every 1-2 hrs to get your ears relax and protect them from muggy environment in use.