You can’t have your sights set on your dog all the time. But with, the Whistle Activity Monitor, you can have eyes on your furry pal 24/7, wherever you may be. The Whistle is an on-collar device that tracks all of your canine’s activities. Whether he’s sleeping, walking, playing, or is up to something unusual, you’ll be notified of all the goings-on with him through your iPhone. On top of those, you can also check out his activity trends, set goals for your pet, and instantly relay info to your vet. The Whistle is waterproof, accessible via Wi-Fi or Bluetooth, and features a ten-day battery life.