Features: AC 80-500V LED dual display of AC voltage and frequency in the same time. The data is more intuitive, LED two-color display, red + green, clear and easy for monitoring at a glance. Do not need power supply, two wires just connect with AC 80-500V directly, then you can finish testing. Easy to install, embedded buckle installation, more stable. Meter only fits with pure AC 45-65HZ power supply, not be used for square wave, inverter output. Specification: Condition:100% Brand New Product Model: YB4835VF Material: Plastic Color: White, Black(Optional) Weight: Approx.70g/2.5oz Display Mode: 0.39in LED, voltage: red word, frequency: green word Measurement Accuracy: 1%(±2 words ) Testing Rate: 2 times/sec Frequency Measuring Range: 45.0 - 65.0Hz Minimum Resolution: 0.1hz Voltage Measuring Range: AC80-500V Minimum Resolution: 1V Package List: 1 x Voltage Frequency Meter Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. .