Forget wires - forget limits. Now you can experience high-end, wire-free, Bluetooth enabled stereo sound anywhere with Opteka BTX-5 Wireless Bluetooth Headphones. Get your music on the move and calls on the fly without breaking a sweat or breaking your concentration. No look, one touch controls. Universal Bluetooth connectivity allows these headphones to sync up with any Bluetooth enabled device - your iPhone, iPad, iPod, Android Smartphone or Tablet, MP3 player, Laptop, or anything else with Bluetooth connectivity. Intuitive controls built surreptitiously into the underside of the ear cups allow you to rewind, skip tracks, tweak the volume, or take and make calls - all without having to look away from whatever you"re doing. Battery free for your battery freedom. Listen to your entire music library in one sitting (or at least a few albums) with our super long, 15 hour battery life (12 hour average). The headphones recharge quickly (under 3 hours and conveniently via the included USB cable (Mini USB - Standard USB). The intersection of comfort and style. The BTX-5 is available with classic black styling, and engineered to maximize sound and comfort. Pressure-relieving cushions sit gently on your ears for a soft yet snug acoustic seal and powerful bass response. When not in use, the swivel ear cups fold flat and fit in the included deluxe case for enhanced portability. Technical Specifications Bluetooth Technology: Version 4.0 Wireless Operating Range: 32.8" (10 m) Battery: Lithium Polymer 3.7V (15-hour) Charging Interface: High-speed USB Earphone Diameter: 40mm Impedance: 32 Ω Frequency Response: 20 Hz to 20 kHz Alternative Connectivity: Removable 3.5mm cable (included) Dimensions: 7.7 x 6.4 x 3.0" (19.5 x 16.2 x 7.5 cm) Weight: