I have only 2 USB ports in my laptop (SONY VPCSA290X »esupport.sony.com/US/p/model-hom···nloadTab
Win 7 64bit)
one of them is taken up by Logitech bluetooth USB dongle/adapter for my Logitech M570 Wireless Trackball »www.amazon.com/Logitech-910-0017···rackball
but I think my laptop has built in bluetooth (please see the attached screenshot from device manager)
say if I lost the bluetooth dongle
how can I connect the two?
I have no clue
thank you so much!