The Water Activity Meter Smart Food Water Activity Tester by GOYOJO is a digital moisture meter designed for testing the hydration levels of jerky, dried fruits, and more. With a hygrometer/humidity display and a portable design, this unit is powered by batteries and features a backlit screen for easy reading. Made with standard materials and originating from China, this GY1 model is a reliable tool for ensuring the optimal moisture levels in your food products.