Xl5135v-1 ac220v power supply--measuring dc voltage--voltmeter Technical index: Digit display: 1999 Operating temperature:0~40 Relative humidity:20%~80% Power supply:ac220v Installation method:inlay Tapping size:76 x 39 (mm) Dimension: (w) 79mm x (h) 42.5mm x (d) 25.5mm Resolution: 10mv Input impedance: 100mª+ Max. Input voltage:ía10v Full range:ía199.9mv.