Emergency Light that illuminates as bright as a typical phone light. Up to 5 days of continuous usage. Just add water. 1. Open the seal of bag 2. Fill the package half way with water 3. Add the salt packet to water (2 tablespoon) 4. Fill the package with water up the the fill line (do not go over) 5. Close the seal at the top of the package 6. Shake slightly to help the salt dissolve 7. After 10 minutes, use the switch to turn the light on and off. 8. Light will continue to work as long as the metal plate is visible inside of the package. Add more salt and water as needed.