Description: FORCE GAUGE, 20 Kg\t Model : FG-5020\t * 20 Kg, Kg/LB/Newton.\t * Tension or Compression, Peak hold, Zero,\t * Positive/ Reverse display.\t * 4 digits LCD with back light.\t * RS-232 computer interface.\t * Full line accessories, optional test stand.\t * DC 1.5V battery (UM-3, AA) x 6 or DC 9V adapter in.