LED Frequency Meter Model:SF-LED96-3,SF-LDE72-3 Accuracy:Class 1.5 Volt.:110V,220V,380V ... 65Hz...54~66Hz LED Frequency Meter1. Model: SF-LED96-3 SF-LDE72-3Fastening:by means of nuts ,absolutely safe ... ,robust,side by side. 2. Accuracy: Class 1.5.3. Voltage: 110V,220V,380V.Frequency: 45~55Hz, 45~65Hz ... case,and PPO plastic material is used for SF series's base.6. Mounting: flush mounting with bracket. SF- ...