Only an Alexa device and Amazon account are required. No additional prerequisites! To use: first pick up the food you've dropped on the ground, and then say "Alexa, ask the Five Second Rule" to begin. Given the surface the food was dropped on and whether the food is wet or dry, this Alexa skill determines if something is safe to eat! DISCLAIMER: This is intended for entertainment purposes only. Do not always eat something if instructed to. Enjoy!