ARCTIC P31X Pack Bluetooth Stereo Headphones and UD2 Bluetooth Adapter - Black The P311 works seamlessly with any gadget that supports Bluetooth technology such as mobile phones and notebooks. You can also use it with your PC by simply connecting it with ARCTICs USB-dongle of UD1 and UD2. With a range of up to 30 meters, this headset gives you full flexibility without disturbing people around you. The integrated lithium-ion battery lasts up to 20 hours of music playback before it needs to be recharged via USB. The UD2 allows 3 people to share music at the same time. The chipset is optimized for CD quality music transmission. Thanks to the five functional buttons, integrated into the right earcup, you always have full control over your music. You can start/pause/skip music tracks, answer incoming phone calls and control volume levels. The integrated 28mm drivers excel in high fidelity. Whether it's rock, jazz or classical, all different genres of music can be enjoyed without any compromise.