This is the tag that lets a canine share its hijinks and innermost musings with all its followers on the Twitter microblogging site. A motion sensor and microphone in the tag interprets your pet's activity (or lack thereof) and selects an appropriate canine-centric message from one of 500 pre-loaded tweets. Tweets are sent from the tag to a USB receiver plugged into your computer up to 100' away that automatically posts them to the Twitter account you've set up for your dog. Messages such as "It might look like I'm just sleeping, but I'm also working on my tan" or "Having my daily workout. Already did 15 leg lifts!" entertain dog lovers while lifting the veil on how a dog passes its time. The included software for Windows 7, Vista, XP, and Mac lets you set the frequency of tweets. Includes one CR2032 battery. Recommended for medium to large dogs. 2" diameter x 11/4" D. (2 1/2 oz.)