Second, laser is actually an upgraded version of photoelectricity, which belongs to photoelectricity, but it is better than photoelectricity. It can be operated on various planes without mouse pad.
Thirdly, compared with laser and photoelectricity, Blue Shadow has better performance, can operate on any interface without mouse pad, and has higher recognition rate.
I suggest you buy a blue shadow, which is more convenient to use. HP's new FM500 is not bad, with a resolution of 1600DPI, which is convenient for location and identification. Look at JD. The price quoted by COM is 79, wireless is cheap, which suits you very well.