This model the caliper is made of carbon fiber composites, at least as indicated by the manufacturer on the back of the device. True or not, I can’t say, because I don’t know how to check it.
But I will say that I tried to cut off the edge of the device with a knife, it is cut very hard.
Of course, this vernier caliper will not argue with a metal analogue, but for household measurements that do not require special accuracy, it works great.
Moreover, the device has a big plus, it's its cost, only 3,59 dollar. What I did not like was the lack of a web retainer.
The device operates on a single LR44 battery. The batteries last for a very long time since the caliper can turn off automatically if you forget to press the shutdown button.
Switch function inches / millimeters.
Button to reset readings. You can measure already from some size.
Range of measurements is 150 mm. Resolution 0.1mm / 0.01inch. Accuracy 0.1mm / 0.01inch.
If you open a small plug on the device case, you can find the connector. It is needed to connect and synchronize the caliper with a computer. This can be done using the module. Arduino.
He conducted test measurements with the device, for measurements he chose a phone whose exact dimensions are easy to find on the Internet. The accuracy was at a decent level.
Conclusion.
: Affordable price, digital display, autooff
: Insufficient accuracy, material of execution
Cost: ~ 250