A compass that can lead you to your friends at a festival. It doesn't require cell service, WiFi neither Bluetooth.
More description:
Simple to Use: Like a compass, you're in the center. Your friend's devices appear as different colored LED dots that mark their exact location around you. You know which direction to walk in to find your friends
Immersive Alerts: Receive fun and interactive notifications that guide you to your friends with a twist of excitement.
Works Anywhere: With easily selectable ranges from 15 feet to over 1 mile, simply follow the direction of one DOT, watch it draw nearer, then unite with your friend. No cellular network required.
Lasts all festival long: Over 24 hours of rechargeable battery life. Using an encrypted radio network, send secure alerts, comfortably explore, and let others know where you are: All without your phone.
Please check these 2 instagrams:
Totem. Labs
Crowdcompass. Io