The new AAA series is the newest, smallest, and most convenient Glo-Toob yet. It takes a AAA battery and is waterproof to 196ft / 60m. Its compact design and convenient, inexpensive battery source allows you to take it with you wherever you go. Great for teaching and allows you and your students to be seen. Twist-tail cap and five colors available. AAA battery included. Three modes: 100% / 25% / Flash.