https://buy.garmin.com/shop/shop.do?pID=67686

The GTU 10 is small, lightweight and waterproof. It easily
attaches to a backpack, pet collar or whatever is important to you.

When you purchase a new GTU 10, it comes with 1 year of Standard Tracking
(coverage dependent on GSM wireless service within the U.S.), so you’ll be ready
to go once you register and activate it in your Garmin account.

Then, you can view the location of your GTU 10 on a map from the friendly
confines of your computer. For an added level of convenience, you can download
the free Garmin Tracker™ app for your mobile device to compare your current
location to the direction and location of your GTU 10. For the ability to
automatically route to your GTU 10, you can use a Garmin nüLink!™ device.

Thanks to Jim Yocom