Aita BT821 Wireless On-Ear Headphones Bluetooth Headset V4.0 Stereo Noise Cancelling Earbuds with Mic for iPhone, iPod, iPad, Android Smartphone, Tablet, MP3 etc. for Kids and Adult (Green) High-quality Sound: the headphones ensure high-fidelity stereo music and clear speech within 10 meters. Rich and strong bass, crisp and clear highs. Bluetooth Headphones with Mic: Built-in Microphone. Music will automatically pause when you receive an incoming call. Buttons on ear-cup allow you to control the volume directly and phone calls. Comfortable Over-Ear Headphone: Superior material on each ear cup cushion, They are extremely comfortable for long periods of use. Long battery life: Successive working time about 10 hours, no worry about power consumption. Retractable and Foldable Design: The adjustable band gives you a good fit, it doesn't hurt your ears. And thanks to this foldable design, it's easy and space-saving to put in your bag, they are also great for traveling. Headphones edge is Diamond-shaped Design, feel good, Anti-drop and Waterproof.