Garmin Chirp Geocaching Wireless Beacon Geocaching beacon automatically transmits data every two seconds with a range of up to 32 feet (10 meters) Stores hints, multi-cache coordinates, counts visitors, and confirms the cache is nearby Up to one year battery life with continuous use; battery is user-replaceable Durable and waterproof device features a cache-perfect small size Password protected to prevent reprogramming of chirp device