Okay pet parents, this is pretty genius - these Wettarn heartbeat simulators actually mimic real heartbeats to calm anxious pets! You get 4 red heart-shaped devices that emit comforting sounds and frequencies, perfect for puppies, kittens, or any pets dealing with separation anxiety. Measuring 2.7 x 2.5 x 0.8 inches, they're small enough to tuck into your pet's favorite plush toys, blankets, or beds. Made from durable plastic, they're built to last through whatever your furry friends might put them through. Here's how it works: just add 2 AAA batteries (not included), press the switch, and it starts beating continuously - creating that comforting environment that makes pets feel like they're not alone. It's perfect for helping new pets adjust to your home, comforting them during stressful times like thunderstorms, or just giving them that extra reassurance when you're away. The battery life is impressive too - one set lasts up to 15 days of continuous use! When you're not using it, just turn it off to save power. Having 4 means you can place them in different spots around the house or have backups ready. Seriously, if you've got a nervous pet or are bringing home a new furry family member, these heartbeat simulators can make such a difference in helping them feel safe and secure.