Description Place of Origin : Zhejiang, China Brand Name : OEM brand Model Number : AD22-22DS-HZ Max. Voltage : 0 – 90Hz Frequency Indicator LED Pilot Light AD22 frequency meter 22mm 25mm 50Hz 60Hz 90Hz Meter LED Indicator Light with Frequency Meter   Function: Mini Voltmeter Ammeter indicator light, signal lights only two lines of measurement and power supply, three digital display AC and DC voltage, wide measurement voltage AC 50 ~ 450V (red light), DC 0 ~ 60V (green light); increase the exchange (red light) and DC (green light) ammeter, four-wire operation; increase the symbol display indicator V / dc, V / ac, A / dc, A / ac; ammeter can be used as a load disconnection instructions with more ingenious; Feature: Size: Φ22 / 25mm Shape: panel round hole installation, short body compact Using Features: increase the circuit board three anti-technology, moisture, dust, anti-corrosion. Advantages: mass production of the patch process, cost-effective, low power consumption, wide range of applications; set anti-touch terminal security cover IP20 Model AD22-22DSV AD22-22DSA AD22-22DS-HZ Type LED Indicator with Voltmeter LED Indicator with Ammeter LED Indicator with Frequency Meter Input voltage AC DC AC/DC AC/DC Measurement 50-450VAC 0-60VAC 0-100A 0-90HZ Indicates the color Red/Green/Yellow/Blue/White The sampling period 0.5s Display method 3 digital