Sennheiser TW9093 SP10 ML USB Speakerphone<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Intuitive user interface - clear microphone mute button， call and volume control and easy cable management </span></li><li><span class="a-list-item"> Long talk time - up to 20 hours with easy charging in just 2 1/2 hours via USB cable or unlimited talk time with constant charging during use via USB cable </span></li><li><span class="a-list-item"> Ideal travel accessory for the quality conscious business professional due to the SP Series' lightweight slim profile </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/414hR7DWBEL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51ZMZY3DrbL.jpg" noproxy>