LDP Digital DC Voltmeter In Pakistan BR4111 Description Product is mainly used for measuring the frequency of kinds of industrial power. LED high bright display. With visual reading and high-resolution power. Level range of input signal is 75~300VAC or 200~480VAC. Photoelectric isolating of the input signal, with strong anti-interference capability. Features Brand: LIRRD Conversion ratio 2.5/s Zero adjustments (Fixed decimal point) Display range ±1999 (LDP3-□□)