Constantly losing your keys? Have a dog who tends to run off? Samsung's new SmartThings Tracker may be able to help.

Unveiled Monday, the small, LTE-M-connected GPS tracking device can be attached to things like keys, pet collars, and backpacks, letting you keep tabs on commonly misplaced belongings via Samsung's SmartThings app for iOS and Android. Samsung says it works better—especially indoors and below street level—than Bluetooth-connected trackers.

"With SmartThings Tracker, it's easier to locate a gym bag or backpack lost at school, a laptop case left in the airport lounge, or a pet that might have wandered too far from home," the company wrote in a news release.

The device also makes it easy for family members to share their whereabouts. Pushing the power button twice sends your real-time location to the SmartThings app, so family members get a notification saying where you are.

You can also set up a geo-fenced area in the SmartThings app to receive an alert when a tracker enters or exits that area. That way you'll automatically be notified when, for instance, your kid gets home from school or your dog runs off your property.

The SmartThings Tracker goes on sale Sept. 14. Initially, it will only be available via AT&T, but Samsung said Verizon will start offering it "later this year."

"Using our nationwide LTE-M network gives you the ability to track and locate your devices just about anywhere," AT&T IoT President Chris Penrose said in a statement. "We're proud to be the first carrier to offer the SmartThings Tracker in the US."

Besides the aforementioned features, the SmartThings Tracker works as a "proximity sensor to trigger smart home automations, like lights turning on when someone gets close to home or the thermostat turning down when the car pulls out of the driveway," Samsung said. It works with hundreds of SmartThings-compatible devices, including smart lights, door locks, thermostats, security cameras, doorbells, and more.

It boasts an IP68 water-resistance rating, meaning it won't break if you get caught in the rain. Samsung says its battery can last up to a week on a charge.