One mono replacement headset for Jabra Evolve 30 II. The headset includes headband, ear cushion and 3. 5mm jack. Black on-ear design with high-comfort ear pads. Mini-phone host interface headphone offers high performance. Black. This phone & computer headset is perfect for everyday use with compatible electronic devices. Works out of the box with all leading systems. Installation is as easy as simply plugging it in.