Outstanding brightness, great for indoor and outdoor use! You'll get a response. It has 15 colors with auto-change and manual switches. Please prepare 3 AAA alkaline batteries. ON: Press for 0.5 seconds OFF: Press for 2 seconds King Blade sheets fit. Stick type size: total length 25cm, light emitting part 15cm, diameter 3cm Long penlight size: total length 35cm, light emitting part 20cm, width 4cm Color variations: Red - Green - Blue - Hot Pink - White - Yellow - Light Blue - Light Green - Purple - Orange - Light Pink - Violet - Lime - Turquoise Blue - Hot Orange Lighting time: approximately 13 to 20 hours Stick type is packaged in a plastic bag. #Idol #Musician #Sports #Penlight #KingBlade