... -in PC. 6.Printer internally installed. 7.Lithium battery installed. 8.Almost infinite storage volume.160G hard disk.9.Suitcase design ... Humidity20-85%, non-condensingViscosity Range10-100 cst (46-2000sus) ±20%Particle SizeNAS 1638:2,5,15,25µm, ISO:4406: 4 ... hard diskPower SupplyAC 220V±10%Rechargeable batterySchematic Diagram: Portable Oil Particle Counter