22mm AC 50-500V 0-99 Hz Round Square Digital Display Voltage Hertz meter Frequency Voltage Tester Meter Indicator Signal Light

Battery Included：no High-concerned chemical：None Voltage range：100-500V AC Origin：Mainland China Model Number：AD101-22VHZ DIY Supplies：Electrical Operating Temperature：Normal Accuracy Class：High Power Supply：AC Display Type：Digital Only

Battery Included: no High-concerned chemical: None Voltage range: 100-500V AC Origin: Mainland China Model Number: AD101-22VHZ DIY Supplies: Electrical Operating Temperature: Normal Accuracy Class: High Power Supply: AC Display Type: Digital Only