Features at a glance Having essential information at a glance is the first step to solving electrical problems on the move. Up to 4 circuits can be monitored simultaneously. Voltage/Current displayed instantly. Can measure up to 199 amps. Large 4 digit display. Low voltage alarm, with audio visual functions. Adjustable threshold level provides ample time to react. Back lighting facility. Low power consumption - less than 5 mA. Compatible fascia plate - white legend on black traffolyte.