2020 year production of 0.28 Inch 2.5V-30V LED volt meter - Tests and thoughts

[Kiriakos GR]

End of 2019 and begging of 2020 I got in my hands the latest production of 0.28 Inch 2.5V-30V LED volt meter.
I got two with blue LED light as spare items for upcoming projects.

My first finding: There is no any PCB marking as product code identification other than L1095 this printed on the plastic bag.
My second finding: There is no way calibrating them due a pot.

Actual electrical measurements and comparison shown that they perform quite well regarding ranges.
Low range this 0~10V and next range up this is 10~30DCV.

Lowest operating voltage this is 3V and since 3.5VDC and higher the LED display brightness this is at maximum.
Both voltmeters required 15mA since 5V and higher, therefore a single voltmeter will require 7mA so to operate.

Personally I think of these Volt meter as usable for any project using double lithium batteries in series ( 7.2V) or more. 
As comparison DMM I did use the FLUKE 8050.   

Note: My digital camera this dislikes LED generated lights and therefore just ignore any color reproduction issues.