A page turning device is a small device used by the Goa'uld when using their tablets. When waved over the tablet, the symbols on the tablet would reorder into the next "page" on the tablet. (SG1: "Brief Candle", "Rite of Passage")
Ma'chello once used a false page turning device to unleash his weapon designed to kill Goa'uld symbiotes. It successfully killed the Linvris, but also resulted in the deaths of the hosts. (SG1: "Legacy")