Educational Insights GeoSafari Wearable Adventure Tools: Wrist Band Outdoor exploration promotes discovery and encourages a lifelong love of science. Wrist band with 6 cool science toolsa hinged dome with air holes, rotating bezel with analog counter, LED light, 3x magnifier, compass, and ruler. Supports STEM learning. Requires one CR1220 battery (included). Part of the award-winning GeoSafari line!