The TBG Hours Meter for DC operations specially features the following specifications/properties: a zero reset-free system, a mounting aperture measuring 50 x 25mm in dimension, a front panel-mounting mechanism and finally, an hour meters derived from the TBG series.

Given any hour meter operating under DC, the time base must not be obtained from the AC frequency, but must be produced intrinsically.

Parameter Name	Parameter Value
Type	hour
Display	analog
Technology	electronic
Other characteristics	panel-mount