Pelouze Rate Calculating Digital Electronic Postal Scale Postal rate changes can be daunting, so choose a scale prepared for updates. This one has a replaceable chip for easy rate updates, parcels-out multiple rate options (First Class, Priority, Express, Canada, Mexico) and even warns when your battery gets low. Auto shut-off saves battery power. Intended for private use only; not legal for trade. Electronic/Mechanical: Electronic; Scale Type: Postal; For Carriers: USPS; Increments: 0.1 oz.