Our Mukikim SpyX Micro Gear Set 10151 features: Strap on the adjustable belt to complete your mission! It holds the Micro Motion Alarm to detect movements, invisible ink pen, Micro listener to hear faraway sounds, and Micro Spy Light to see in the dark. Two AAA batteries, not included, and lithium batteries, included. Ages 6 and up. Dimensions: 12" x 10" x 2.4"