We are offering single phase frequency meter. bdpm-f2 4 digit single phase frequency meter features: crisp, bright, flicker-free led display pre-calibrated meters latest lsi ic technology auto polarity and auto zero compact design robust terminals solid-state circuitry international styling specification: aux options a. 240vac (+-20%) b. 85-265 acdc accuracy class 0.5 display 3 â½ 4 digits 0.56" height red dimensions 96x48 cutout 92x44 96x96 cutout 92x92 mounting panel door