... 30.00)A±(0.2%+30mA)Communication InterfaceRS232/RS485(optional)Resolution10mV, 1mALowest conductive resistance<0.08ΩRipple ... groups, 32 steps each groupBattery testing0.01mAH~4000AHInterfaceRS232, RS485, USB(option)ProtectionOver-voltage, over-current, over-power ... AC cable, handle bars, software CDOption accessoriesRS232 adapter, RS485 adapter, USB adapter, Mounting rackPower source115V/230VAC±15%, ...