Summary: Put in batteries, turned it on, and it's working fine. Bought it for use with a new laptop as I hate touch pads. People with clicking problems, please note. This item has a battery saver function which turns it off after about a minute of no movement. You have to get in the habit of 'left' clicking it each time you put your hand on it, to wake it up.
Summary: This mouse stopped working almost as soon as I turned it on. The sensitivity is terrible, and the overall design does NOT work well. Do not get this - spend the same amount, or a bit more, for a better brand.