... 2. LED/LCD display 3. Current and Voltage Combined Meter. Name: Digital AC amp meter and Voltage Meter /dc ammeter meter voltmeter Model: YD4UI-9D4Technical parameter AccuracyDisplay ... supply AC/DC80~270V.Power consumption≤5VAIsolation withstand voltagePower supply and input, Transmitting output, Communication interface AC2kV, Input, Transmitting output, Communication ...