If printing is continuously performed with a high ratio, the overcurrent protection may be activated and result in uneven print density or a low voltage error. Therefore, the printing length must not exceed the following values when printing with high print ratio. Print width: Number of dots being energized per one dot line Reliability 30 Baggage tag Total print width: 407 dots (50.8 mm {2.00"}) Print example 50.8 mm Print length 20 mm {0.79"} Life Printer Print head Paper feeding of 100 km or 5 years, which comes first 100,000 baggage tags = 14 million lines MTBF 360,000 hours