A " Must Have" tool for the speaker enthusiast or professional_Glow-in-the-Dark Buttons for use in dark environments_Large LCD with backlight for easy viewing_Super bright LED strobe (1000 lumens) is visible even in well-lit rooms_Single-step or continuous frequency tuning adjustment_Ergonomic ABS Plastic shell is solid and comfortable to operate_Memory storage for up to 10 sets of flash frequencies