The 120V AC Adapter was designed for the 553KL. By using an adapter, you will enjoy constant power without needing to change the batteries often. The cord is a generous 6 ft length to allow for flexibility in placing your scale.
Scales compatible with ADPT31 are:
498KL, 499KL, 500KL, 522KL, 524KL , 1100KL, 2101kL, 2000KL, 2400KL, 2500KL, 2600KL, 2610KL, 2650KL, 2700KL
Made in the USA