Hydraulic Hand Held Dynamometer Tub Lifts So all you have to 01804 So all you have to do is let it dry and replace the battery 5V AA size alkaline batteries or optional rechargeable battery pack or AC power (charging stand) * Powerful Memory for 72 hours of data storage * Compatible Works with Nonin s full line of sensors * User friendly Large LED display Yields accurate grip strength readings without the subject being able to feel the handle move * Features an adjustable handle with five positions to accommodate to any hand size * The indicator remains at the subject's maximum reading unit until it is reset * Registers up to 200 pounds and reads in pounds and kilograms * Includes a carrying case *