Model PS-50 (patented product) Flare points: 1.With an 8-digital calculator and a 2-meter-long tape measure available 2.Use in dark with attractive backlight available 3.Reading memorizing function which can save 10 groups weight data 4.Reading locked function Detail decription: 1.Capacity:20kg/20g,30kg/20g,50kg/50g. 2.Units: kg, lb, oz 3.Automatic power-off: 1 minute 4.Operation temperature: 0 - 40oC (32oF - 104oF) 5.Supply power: DC 4.5V (3 x LR44 Li battery) 6.Overload indication: EEEE 7.Backlight color: green 8.Scale size: 110 x 77 x 45mm 9.Product N.W.: 283g 10.Packing:Carton