Features:The protection board supports power supply TVS surge protection; when power on, power supply has a instantaneous high voltage, and TVS can reduce instantaneous high voltage to protect circuit.The 1% high precision divider resistor makes voltage measurement more accurately.Voltage precision and resolution is 0.1 V, and has calibration function.Lower digital tube display brightness, energy saving and protect your eyes.Save parameters when power failure to avoid repeated settings.If set start and stop voltage to a minimum (< 6V), it can be used as a voltmeter to measure 7 to 60V voltage.With energy saving mode and restore to factory setting function.Designed with three control buttons, four-digit display, 1 charging indicator LED light.It can charge 6-48V lead-acid battery and lithium battery; charger voltage range is DC 7 to 60V.Specifications:Working Current: DC 6-60VWorking Current (at 12V power supply): Standard mode, standby current 10mA; Charging current 130mA;Energy saving mode, standby current 5mA; Charging current 125mAMode: Standard mode, energy saving mode, setting mode, voltage calibration, factory settingsDefault Start Charging Voltage: 12V Default Stop Charging Voltage: 14.8VRelay Maximum Load Current:30A 250VAC/30VDCSize: 8*4.5cm/3.14*1.77inWeight: 53g(approx.)Package Includes:1 x Protection Board