Stylish foldable headphones that provide and NFC connectivity, built-in rechargeable battery and microphone for hands-free use, as well as Bluetooth 4.0 connectivity with 10m range and aptX support which ensures high quality of transmission with excellent sound. The controls (track skip, play, pause, etc.) are easily reached from external keys on the ear piece. An everyday advantage of the stereo headphones arises from the possibility of using them for call management (call answer, end call, last number redial, etc.). Call functions can be controlled over the same keys, and phone calls can be handled on the device itself thanks to the built-in microphone. Besides being able to connect Bluetooth-enabled devices, the headphones offer NFC connectivity for intuitive coupling via swiping the NFC sensor. In addition, they support multi-pairing for simultaneous wireless connection to two devices simultaneously. The powerful lithium-ion battery provides up to 14 hours of music listening enjoyment, or up to 540 hours of standby operation. To recharge the device, simply connect to a USB port (for example, on a laptop). The headphones can also be operated in a conventional manner with the included jack cables. When used this way, the internal battery is not utilised (the hands-free function cannot be used in this case). The ergonomics of the headphones are geared towards an uninterrupted long-term use: soft, closed ear cushions with leatherette upholstery, an adjustable padded headband with leatherette cover fits easily over any head. Another advantage results from the collapsible construction and low weight, which ensure high wearing comfort and allow for space-saving transport. As an optical accent, the exterior is made of brushed aluminium. Frequency response: 20 Hz - 20 kHz. Impedance: 32 Ohm. SPL: 103 dB. SNR: 85 dB. Weight: about 255 g.