HQ 22mm LED Frequency Meter 20 ~ 75 Hz 50Hz 60Hz / AC24~AC500V 110V 220V 240V
Hole Size ：21mm ~ 22mm. Frequency detection range : 20Hz ~ 75Hz. LED display clear, Long life, Low power consumption. Item Arrived Ratio. United States.
Hole Size ：21mm ~ 22mm. Frequency detection range : 20Hz ~ 75Hz. LED display clear, Long life, Low power consumption. Item Arrived Ratio. United States.