It is a Digital Meter Multimeter 4in1 Voltmeter/Ammeter/Power Meter/Energy Meter, 6.5 ~ 100VDC, Rated Power: 5000W, Measuring Current Range: 0~50A,  It has small size, high efficiency, long term stable and reliable quality,easy installation and use . Applications:Suitable for industrial equipment,electronic equipment measurement or other products voltage/current /Power /Energy measurement. 

Parameters:

• Input Voltage: DC 3.5~30V(please don't over 30V)
• Output Voltage: DC 0.8~29V(This is a buck module, please make sure the input should be higher than output at least 1V)
• Output Current: 10A(Max)
• Conversion Efficiency: 92%(24V to 12V 2A)
• Dimension: 85 x 58 x 33mm (L x W x H)
• Weight: 105g
• Onboard Voltmeter: can display input or output voltage, short press the button below digital tube to switch. when "IN" LED indicator lights on, it measures input voltage and "OUT" LED on measures output voltage.
• Red digital tube display, the quiescent current is 2~8mA(related to whether the digital tube is open or not).
• The voltage display has been calibrated before leaving the factory, don't need additional calibration.
• Note: this module doesn't have reversed connection protection.

Package Includes:

• 1 x DC Converter Module