... provide meter ,voltmeter,ammter,power meter,domestic electric meterskwh panel meter.......Shape and hole cutout dimension Unit : ... ×727272666680676796×4896489044100914548×4848484444704545ultrasonic gas metersFour Button on the panel, can set the parameters by user 14mm,7 ... ABS Plastic shell Short-depth dimension, instal to the Electric Power Cabinet easily Can measure current, voltage, frequency ...