ZEALOT B21 Stereo Wired Wireless Bluetooth 4.0 Subwoofer Headset with 3.5mm Universal Audio Cable Jack & HD Microphone, For Mobile Phones & Tablets & Laptops 1. Whether you are an audiophile or casual listener, when it comes to choose a headset, this item is your prior choice. 2. Equipped with sliding touch function (available only in Bluetooth mode). 3.The imitation protein material is used as the ear skin with a soft characteristic sponge, which is still breathable even if worn for a long time. 4. Wide compatibility. compatible with 99% electronic devices with bluetooth function, you can enjoy your favorite music whether when you are home or out with your phone or tablets. 5. Equipped with 3.5mm audio port, connect to mobile phone tablets or notebook to listen to music are accessible. 6. Built in 500mAh battery, 3 hours charging time, long use and standby time. 7. Full package large ear muff design, using acoustic sealing structure to reduce leakage.