Designed for patient weighing when used with the PL-425 Patient Lift and PL-450 Sling Seat. Keypad controls on/zero, off and lb/kg display select. .75" high-contrast LCD display with annuniciator for lb/kg, zero, low battery & display lock. Powered by one 9V battery. Unit measures 4.125"W x 2.125"D x 4"H (center of eye to center of eye; 5" overall).- Patient Lift Indicator, 400lb Capacity