Philips perfectly knows what kind of mice are popular on the market: a Bluetooth mouse variant, a USB mouse, and a touchpad one, so the company decided to create a combination of three. You are welcome to use the following functions all three together. I mean if you need a Bluetooth mouse, you are welcome to use it as a  Bluetooth mouse, if you don’t want, plug it in via USB and you get a USB mouse. Also, you can mish-mesh the functions. Pay attention that the click wheel has been replaced with a 360°TouchControl sensor. The thing I like the most is the price – $80.