1. IMPRESSIVE SOUND QUALITY: This is a bluetooth headphone features with a 40mm large diameter aperture drivers and bulit-in high detail microphone. Wide frequency range reproduces precise deep base and high clarity sound. You can expect comfortable listening experience for both music playing or phone calls. 2.BUILT TO STAY COMFORTABLE: The Memory-protein ear cushion simulate human skin texture, ensuring lasting comfort. The stainless steel slider and softly padded headband allows you to find the perfect fit without constraint and provide excellent durability. 3.NEVER POWER OFF, BOTH WIRELESS & WIRED:  The wireless mode: A built-in 1000mAh battery provides up to 24-hr music time/15-hr talking time in a single charge; 2. The Wired mode: you can also use it as a wired headphone with the provided audio cable so the headphones will never power off. 4.TAKE YOUR TUNES TO GO: Space-saving foldable design not only saves space but also makes it portable. Best choice to take it study, outwork, travel. 5. Bluetooth headphone fit the modern city lifestyle for everybody, no matter you are office worker or student, teenager or girls.Devices with all sorts of smart phones, tablets, computer or music player.