Giantdeer 12V DC Digital Voltmeter With LED Display,Suitable Lead acid Battery and Lithium Battery,Voltage Meter 20W Dual USB Ports

2-in-1 Battery Monitor: DC8-30V Battery Monitor tests battery capacity. At the same time, the battery tester can also display the voltage value. Dual USB Ports: You can plug it directly into your mobile phone or other devices to charge them with 5V charging voltage. LED Display: white illumination, clear and bright in every corner, easy to check the battery. Suitable for Different Batteries: e.g. 12V24V lead-acid batteries, L03 Li-ion ternary batteries, F05 lithium iron phosphate batteries. Practical Connection: red wire connects to the positive pole, black wire connects to the negative pole, only two wires are needed, easy to connect and use, remaining power optical indication, clearly visible. Wide Range of Application Scenarios: suitable for high and low power distribution cabinets, display cabinets and exhibition stands, photovoltaic inverters, assembly line testing, electronic maintenance, electronic DIY, etc.