Features Easy Setting: Intelligent digital voltmeter, upper and lower limit alarm output, and AC DC universal input can be freely set. Various Function: This instrument has digital filtering function, range change, free decimal point setting, upper, lower, and interval alarm relay output. Reliable Alarm: The relay alarm output includes power on alarm suppression, power on delay alarm, and alarm delay output alarm output delay. Transmission Output: Able to transmit the signal, transmission output has the form of voltage output to other devices. Quick to Install: Comes with a compact size and a light weight as well, the digital voltmeter is very convenient to install within several minutes. Specification: Item Type: Digital Voltmeter Material: ABS Measurement Accuracy: 0.8%+5d AC, 0.5%+5d DC.  Response Frequency: 45-400Hz, for AC only. Working Power Supply: 85-265V AC, power consumption less than 3VA.  Working environment: -10℃~50℃, humidity below 90℃rh.  Measurement speed: 2-3 times per second.  Package List: 1 x Digital Voltmeter 2 x Accessory Package List 1 x Digital Voltmeter 2 x Accessory