... is a patented product, powered by batteries or (optionally) via a mains adapter. Flip-up protective cover ... the green backlit LCD display (optionally red, blue or green), with the calibration weight stored just to ... by 3 x 1.5V LR44 Li batteries, or via an optional 4.5VDC mains adapter. Specification Units ... Power: 3 x 1.5v LR44 Li batteries, or optional 4.5VDC mains adapter. Temperature limits: 0degC ...