Detailed Product Description Name: Frequency meter with reeds typeType: SD-96Size(mm): 96X96Accuracy: Class 0.5Voltage: 50V 100V 220V 380V 440V Frequency: 45~55Hz, 45~65Hz, 55~65Hz, 47~53Hz, 57~63Hz, 44~56Hz,54~66Hz.Mounting: flush mounting with bracket.