Aceyoon Car Usb Charger Multi Port Voltmeter 24W 3.1A 12V / 24V Dual Usb Car Adapter Charger Voltage Compatible For Cellular Phones (I12 I11 Xs Xr, S10 S9, P40 P30, Mate30, Pixel)

97% it shows ampere and 3 % voltmeter..Its not i wat..

Works as promised. I really only wanted the voltmeter. My daughter's car just left her standing because the battery got weak and I thought this might give her some warning. Liked it so much I bought one for my car. USB ports are a bonus.

The reason I bought this particular charger is the voltage display when the car is running. Not a big deal but cars don't have volt meters now and its a good bit of data to know.

Was having charging issues so I wanted a voltmeter on the dash to monitor the alternator and battery. This unit is great. Reads the instantaneous voltage and charges my cell phone. Couldn’t be better.

I have an older car without a voltage display. I just plug this into my lighter and I can see the voltage of the car battery. Buy it!

Great adaptor for the car. I love the digital voltage disply.