Material: Digital Hour Meter is made of high quality ABS plastic, which is durable, stable and reliable, suitable for different environments, easy to use. Flashing Alarm: Displays 2 hour flashing alarm when the specified time interval is reached. The power supply voltage is 220-240(V) AC. Automatic synchronization time: The accumulator is composed of a high-precision crystal oscillator synchronization circuit which has no no need to be adjusted, and time starts accumulating when powered on. Function: Timer with digital display automatically accumulates start time and tracks motor working time . Multiple Applications: AC 220-240V 50Hz Hour Meter is widely used in construction machinery, construction vehicles, generators, air compressors, cranes, etc. Specification: Item Type: Digital Display Hour Meter Material: ABS plastic Power supply voltage: 220-240 (V) AC Power Consumption: 0.3W Frequency: 50Hz Time: 0-99, 999.99h Package List: 1 x Digital Display Hour Meter