1)Panel size 96x96mm, 220V 2)Measure 57-63Hz, Class 1.5 3)Matrial: PC, ABS, LED 4)Mounting: Flush mounted LED Frequency MeterModel ... plastic material is used for SF series's base.Mounting: flush mounting with bracket. Mounting: SF-LED96 Max 43mm,SF-LED72 ... analog ammeter, AC/DC analog voltmeter, AC/DC digital panel meters. Different panel sizes(e.g 96,72,48) and measuring range ...