Molded in a black phenolic case, this distinctive style meter with clear acrylic window provides wide angle visibility andn can either be surface mounted or bezel mounted (semi-flush mount) with one of Simpson's Wide-Vue bezel kits. Available in three standard sizes of 2-1/2", 3-1/2", and 4-1/2", the Wide-Vue is ideal for reliable measurement of AC current ranges between 1 and 300 amps or 10 and 500 milliamps. In addition, Simpson offers dual range units in 3-1/2 and 4-1/2“ sizes that measure both 0-150 volts and 0-5 amps on one dial. AC meters measuring current inputs between 5 and 50 amps can be ordered as self contained units or as 5 amp panel meters to be used with an optional external transformer. Current inputs above 75 amps must be used with an external transformer. All units are guaranteed to 2% full scale (F.S.) accuracy and meet American National Standards Institute specification ANSI C39.1.