Standard centre pole moving coil construction incorporating rectifiers and housed in a sloping front plastic case.
Mirror backed scales for more accuracy in reading. Accuracy 2.5%. Colour Coded Terminals 4mm. Analogue meters should have a strip of mirror below the scale so that the user can read from any angle. Can place the pointer over the reflection of the pointer to be sure the eye is exactly vertical for accuracy.
This voltmeter can read 0-3V, 0-15V, & 0-300V.