Muitiple displays in N/KG/LB, auto unit conversion * RS232 Computer interface / Software for data download and analysis * Work temperature / Humidity: 0C to 40C, 15 to 80% * Power Supply: 110 to 220V AC battery charger or battery operation (Nickel battery 6V/1500mAh ); * Work environment: No vibrancy and corrosion;