TSC Auto ID built its reputation on building the most rugged and reliable thermal label desktop printers. We have now used this engineering and manufacturing expertise to design the industrys best reliable and rugged portable label printer. The TSC Alpha-4L 4-inch (102 mm) direct thermal portable label printer features a rugged design and reliable performance that will continue to operate long after other printers have failed. As with all TSC built printers, we back up our claims with the industrys best two-year warranty.