Snuggle Puppies, with a new and improved heartbeat, are sure to capture you and your pet's heart. All ages of animals use our adorable because they connect with the real feel heartbeat and gentle warmth. Heartbeat with batteries and two types of heat included. Machine washable, gentle cycle and mild detergent – nothing small to chew off either, as safety and security are our utmost concern. This product was designed to help calm, soothe and allow pets (and their people.) to sleep better.