The Hoyer Water Powered Bath Lift is an ingeniously designed device that uses your household's water pressure to power its lifting mechanism, and can heft up to 200 pounds of weight using as little as 20 PSI! No batteries are required for operation, and the unit attaches directly to your existing bath fixtures. This bath lift weighs only 20 pounds, so it's easy to take along with you on vacations or visits with friends and relatives!