SmartSpeed E7-KY Wireless Headphones Bluetooth 4.0 Headphones Over-Ear HiFi Stereo Headset with Mic Rechargeable NFC-enabled Compatible with iOS Android Phone Tablet PC (Silver) Advanced Bluetooth 4.0 allows 10 meter/33 feet range with full bandwidth transmission and no loss of audio performance. Premium stereo drivers feature perfect clear highs, dynamic mid-range and thumping clear bass to enjoy gorgeously rich and high fidelity quality sound for a fully wireless experience. Memory foam cushions and padded headband with soft protein leather offer you a cozy and long-time wearing experience. Earmuff is 90 degrees rotatable to perfect fit, ergonomically designed for optimal comfort and sound deliver. Answer hands-free phone calls with the built-in microphone. Stay unplugged up to 12 hours thanks to the rechargeable battery and charge it about 4 hours for next playtime through universal Micro USB port. Battery indicator on iOS devices. Intelligent near field communication (NFC) technology connects your headphones with your NFC-compatible devices in a fast and convenient way only through a gentle tap. 3.5mm audio jack provides a simple wired connection of a variety of devices and never consume its power. Compatible with Bluetooth 4.0 devices, including iPhone, iPod, iPad, Samsung, Nexus, Android, HTC, LG, Nokia, Windows Phone, Bluetooth enabled TVs and tablets, and more.