These are Bluetooth 4.0 Stereo Headphones- Advanced Bluetooth CSR version 4.0 Latest technology. Wireless Freedom- Stream music directly from your smartphone or tablet, and be free of annoying, tangled cords. Charges quickly and lasts hours- The PH-BT3 headphones feature a lithium-ion battery that not only charges quickly, but gives you up to 12 hours of battery life. Compact form factor and stylish design- These headphones were designed to be small enough for you to comfortably tote around. Soft-touch rubberized exterior, for a wonderfully smooth, tactile experience.