*Designed to keep pets cool and comfortable. *Activated by weight or pressure. *Will maintain a temperature of up to 10°C cooler than the surrounding temperature for 3-4 hours of constant use. *To recharge, remove any weight or pressure from the pad - no electricity required. It only takes a brief period of non-use to recharge. *To speed up the recharging process, soak in ice water or freeze. *Perfect for pet's bed, crate, kennel, car travel, dog shows and dogs prone to overheating.