The Sandberg 2in1 Office Headset Jack+USB is a clever all-round connection headset. It has both a MiniJack and a USB connection. This means you can connect it either to the USB port on your computer or to the 3.5 mm audio jack on your smartphone or tablet. The clear and crisp sound reproduction of this headset is perfect for online... meetings. Both the microphone boom and the headband are adjustable for an optimal fit.