Chirp is a one-of-a-kind wireless beacon designed specifically for the outdoor adventures of geocaching. Affordable, durable and waterproof, chirp can communicate with, and be programmed by, any compatible wireless-enabled Garmin handheld (sold separately). chirp stores hints, multi-cache coordinates, counts visitors and confirms the cache is nearby. chirp is password protected and has a battery life of up to one year.Get & Store Hintschirp can be programmed by any compatible wireless-enabled Garmin handheld to store geocaching hints and other information. When other geocachers arrive near your cache, they'll be alerted that the cache is nearby, and then they'll be able to access the hints you've loaded into chirp. And when you return, chirp will tell you how many visitors have been to your cache.Setup a MulticacheWith chirp, setting up and maintaining a multicache has never been easier. Using your compatible Garmin handheld device, chirp automatically transmits program coordinates so other cachers can find each stage of your multicache. Or if you're on a multicache, chirp lets you download coordinates. So there's no need to manually enter numerous sets of complex coordinates--there's just one simple touch and you're on your way to the next stage.Built To Cache--Built to Lastchirp was designed by geocachers, so it's built to take the rigors of the outdoors. Plus, chirp is password protected, so you're the only one with programming powers. chirp has a battery life of up to a year and the battery is easy to replace, plus chirp features a cache-perfect, small size and is durable and waterproof.There are a few guidelines, however:Do not mount the chirp inside a metal container.Do not bury the chirp.Do not put the chirp in water.A compatible Garmin device should detect the chirp within 10 m. For maximum transmission range, allow the chirp to have an unobstructed view in all directions.chirp SpecsDimensions (W x H x D): 1.3 x 0.9 x 0.3 inches (3.3 x 2.3 x 0.7 cm)Weight: Less than 1.0 oz (28 grams)Waterproof: Yes (IPX7--1 meter for 30 seconds)Battery: Up to 1 year with continuous use; user replaceable battery; message appears on your compatible Garmin device when battery is lowRange: Up to 32 feet (10 meters)Password protection: YesWhat's in the BoxGarmin chirp; CR2032 Lithium Coin Cell Battery; Small Adhesive Disc; InstructionsFREE! Sellers: Add a FREE map to your listings. FREE!