... Accuracy:Class 1.5 Volt.:110V,220V,380V Frequency:45~55Hz,45~65Hz...54~66Hz LED Frequency Meter1. Model: SF-LED96-3 SF ... side. 2. Accuracy: Class 1.5.3. Voltage: 110V,220V,380V.Frequency: 45~55Hz, 45~65Hz, 55~65Hz, 47~53Hz, 57~63Hz ... information or have further enquiry, welcome to contact us. LED Frequency Meter