Why you need a Automatic Timing Heartbeat Toy to your puppy?-It designed to your puppy comfort and reduce anxiety. -Includes a timed heartbeat can calm your pet and keep away barking and whining. -Stay away from crying, loneliness, anxiety without medication. -With the company of Heartbeat toys, our puppy would adapt to the new home as soon as possible and can sleep better.-Automatic 6-hour timed heartbeat invisible velcro pocket, easy in and easy out.Instruction Munnual 1)Tap the switch device to start working. 2)Press and hold the switch for 3 seconds to turn off the unit. 3)The device stop after 6 hours of operation. 4)Need 2 AAA batteries (Not Include inside)