This heart worked a treat! Our new puppy was very clingy and would not sleep alone in his crate so after 3 nights of Alfie sleeping with me, I was desperate for some decent sleep, I investigated heart beat sounds and found this. I already had a heat pad so didn’t need to buy the soft toy that you can get with it, it worked immediately! He went to sleep after being put in his crate and slept for 4 hours straight. Because it can be set for 8 or 24 hours, there was need to fiddle around re starting it after in the early hours after Alfie woke for a pee, he just went of to sleep again. He now sleeps through the night and snuggles up to the heat pad and heat beat as soon as he’s in his crate. Brilliant!