I have posted a review on Microsoft's new Wireless Notebook Laser Mouse 7000. Here is an excerpt:

The Microsoft Wireless Notebook Laser Mouse 7000 is about 4 inches long, 2.3 inches wide, 1.3 inches high and weighs a few ounces. The weight is less because of the one battery. The mouse includes the standard five buttons for basic mouse functionality (two on top, the wheel and two sides). The mouse has a two tone silver and black design. The black is the "glossy black" comparable to the Xbox Elite, Samsung TVs, etc. The scroll wheel is the standard translucent tilt wheel with scroll wheel detents, but seems skinnier than previous versions. The mouse has a black bottom, with a single battery compartment accessible from there. The battery compartment door is not attached and comes off easily - I'm not sure why they did not have it flip open. On the bottom are the laser optical sensor, connect button. When you insert the transceiver back onto the bottom of the mouse there is an on/off switch that cuts power. However, when I put the transceiver back for some reason the on/off switch did not go off and the mouse overheated - when I pulled it out of my laptop bag is was quite hot and did not work. Thankfully it cooled down and worked a little later when I went to write the review. There is a battery indicator on the top of the mouse which flashes if the battery is low.