Those are Phillips screws so you need a Phillips screwdriver -- preferably one of those precision screwdriver sets with Phillips drivers in various sizes. Use whichever one is the best fit and sits properly in the screw-head.
Yes, a Phillips head, but make sure it fits. Many Phillips head screw drivers, especially the smaller ones come to a sharp point, where the screw heads do not, so the driver head does not fully engage the screw head and can strip it out. I have a few Phillips screwdrivers where I have filed off the points so they have a more positive fit.