... 5.Super slim, only 7mm LED Multifunctional Mousepad Calculator with 3 USB Port Features: 1.Battery InstallationOpen the battery cover, insert ... both Mousepad and Calculator, also with 3 Port USB 2.0 Hubs,3.can be connected with USB connector. 4.10-Digital arithmetic ... , Memory Calculation: M=, M-, MRC5.With blue moodlight 6.Slim, thickness only about 7 mm 7. ...