This rectangular hour meter can be used for device where time is used to determine oil change intervals, service requirements or where there is a need to record hours operated Voltage: AC100-250V Power Consume: 1W Dielectric Strength: 1500V / min Working Temperature: -40 C to +50 C Color: Black Material: Plastic Package Contents: 4x Hour Meter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.