Luxa2 BT-X3 Bluetooth Stereo Headphones Black LHA0049-A. Powerful 30 mm Neodymium driver delivers Crystal Clear Stereo Sound. Expertly engineered and tuned for unbeatable sound quality. Extended Wearing Comforts with Breathable Cushions and Adjustable Headband. High Performance Microphone with Clear Voice Capture (CVC) Technology. Hi-Fidelity Bluetooth 2.1V + EDR A2DP for Interference-free and Accurate Sound Quality. Hands-free mobile calling track control and volume control. Long-lasting & Rechargeable Battery.