size, can be operated within a wide voltage range With positive and negative poles for easy installation timing accuracy with error under 1 6 digit display, from 1/10 hour to 99999.9Applications: Dynamo, air conditioning, air compression equipment, etc 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 Included:1x Hour Meter Note:Light and different displays may cause the color of the item in the a little different from the real thing.The measurement allowed error is +/- 1-3cm.