REI offers the Garmin Chirp Wireless Beacon for Geocaching
, model no. 010-11092-20, for $15.93
. Choose in-store pickup
via ship-to-store to avoid the $5.99 shipping charge. That's tied with last week's mention and $7 below the lowest shipped price we could find for this beacon. Sales tax is added where applicable.
This waterproof device works with and can be programmed by any compatible wireless-enabled Garmin handheld GPS; when a geocacher comes within 32 feet of it, it "chirps" out a message (greetings, hints, etc.). It runs on a single CR2032 battery for up to one year.