Brecknell PS-USB Portable Shipping Scale NTEP Legal For Trade 30 kg/ 70 lb, Free PS7 Pink included Salter Brecknell PS-USB- 30kg/ 70lb/ NTEP Legal For Trade/ 30 kg x 0.01 kg / 70 lb x 0.02 lb Power- 6VDC 500mA adapter with center positive or four AA batteries Units of Measure- kg, lb, lb:oz* (*non-NTEP)/ Platform Dimension: 355 mm (W) x 305 mm (L) / 14" W x 12" L Brand new with 1 year manufacturer warranty RS-232 and USB Interface/ The PS-USB features RS-232/USB interface that can transmit and receive using a demand type protocol.