I have two Microsoft wirless mice in the same room. They have settings to keep them from interfering with each other. Each of the mice will work at least 12-15 feet away from the reciever. I would try farther away but I run out of room in my office. When I got the mice they cost IIRC about $30 each. The only trouble with them is the rate at which they consume AA batteries, which really isn't that big of an expense actually. HTH, Jens ...lost in Montana... Ken - - - 3/14/03 6:50 PM >I have a B&W G3 with a normal mouse on it. I also have a G4 with a >Logitech Wireless Mouseman. It's time for me to replace the mouse on >the G3 and I would like to get another wireless. Will this be a >problem? Since the keyboards and mice for both computers are on the >same desk, I'm afraid that one mouse will move both cursors. Do >different companies use different protocols or frequencies? I'm afraid >I'll have to get a wired mouse for the G3. :-( > >Thanks, > >-= Ken =-