Configured with built-in lithium battery for 3-4 hours working, Software ... wave, dense wave, alternative wave (2) Pictures (Configured with Pattern reversal stimulator)a) Pattern mode: checkerboard, vertical grid, bar gridb) Image Size: 64 ... ~ 20 times / sece) Free to edit, set the pattern or color pattern. (3) Flash (Configured with goggles)Stimulus frequency: 0.1 ~ 20Hz adjustable