bdled_dc voltmeter, dc12~100v monitor, 7/8" hole crdi features: operating input voltage: dc voltage only working voltage: dc 12 ~ 100v 2 line wire connectting display: diameter 1.14" led digital tube display color: green dimensions: dia1.14" x 2"(length) mounting cutout: diameter 7/8” (22)mm wire connecting : >18awg, fork spade m4 input : 2 line measure accuracy: 1% power consumption: 0.3w applications: suitable sensor stick temperature measurement, sensor wire length 6inch.