● Nominal Input Voltage: 120V AC or 240V AC.
● Frequency Range: 50 Hz or 60Hz.
● Scale: SLOW / FAST.
● Indication: Moving pointer.
● Angle of rotation: 360°.
● Case: Metal, standard 4.5 inch switchboard.
● Front panel mount.

Indicates the synchronization point (scale center) when the frequencies and the phases at a generator side and a bus line side are matched.
When the generator side frequency is more than the bus line side frequency, the needle rotates in the FAST direction.
When the generator side frequency is less, the needle rotates in the SLOW direction