You can change the sensitivity of the mouse as well. Let me start with some basics about the packaging, and then Ill go from there. - a lithium ion battery (also awesome and a must these days) and lasts up to 24 hours depending on volume. • The link cable is significantly longer than the previous model. Called Plantronics again and they said that brand of phone is not compatible either with the headset, so I asked what phone works, they could not tell me there were so many so they said you can buy our VVX300 desk phone ($63) so I asked if the VVX300 will hook right into the CS540 headset and they said NO you also need a new special cable APP-51 ($27) to make it work. The fit is great After putting up with chafing and blisters for a few days, Ive given the shoes to my sister. These look less casual and are made of quality materials so wearing them to the office now is great. This is my 4th or 5th pair of these slippers. This is my second pair as I wanted a different colour.