Pelouze PE5R 5-lb.Capacity Rate Calculating Digital Postal Scale 5-lb. Capacity Rate Calculating Digital Postal Scale weighs items in 0.1-oz. increments. USPS rates are updated by a replaceable chip using an electronic process. Scale is powered by 4 AAA batteries (sold separately) or optional AC adapter ADPT2 ( sold separately). Computes First Class Mail, Priority Mail, Express Mail and International to Canada and Mexico rates. Auto shut-off. Updated rate chip. Intended for private use only; not legal for trade.