Hello there , I purchased 4 x your D.C. Digital Voltage and Current meters , the user guide in each is different completely from the pictures on the back of the unit itself . The instructions paper says it’s power supply is AC 220V and on the unit itself it says Power Supply DC 3-40V ?????
The diagrams are different too . Please assist me with how to connect them up .
The Box says it’s a D85 Digital Meter LCD DC 199.9V 200/75mV
Thank you in advance .