uxcell Red LED Digital Display AC 0-300V Voltage Test Panel Voltmeter Product Name : 3 1/2 LED Voltmeter;Voltage Detection Type : AC Voltage;Measure Range : 0-300V;LCD Display Size : 5 X 2.4cm/ 2" x 0.94"(L*W) Power Supply : DC 5V 10% ;Power Consumption : &lt;100mA ;Display Method : 7 Segment LED Display;Sampling Time : ~3 times/sec Overflow Indication : -1 or 1;Total Size : 7.9 x 4.3 x 2.5cm/ 3.1" x 1.7" x 1"(L*W*T);Panel Mounting Size : ~7.5 x 3.9cm/ 3" x 1.5"(L*W) Insulation Strength : AC 300V ;External Material : Plastic;Display Color : Red Shell Color : Black;Weight : 37g;Package Content : 1 x LED Voltmeter