VRETTI thermal label printer for small business VRETTI 4x6 shipping label printer *VRETTI shipping label printer support label width from 25.4-115mm（1-4.5"). *High Speed Printing at 6"(152mm)/s. *Adjustable Printing Width between 1-4.25". *VRETTI thermal label printer works with all windows, mac, linux system. *VRETTI shipping label printer is Widely application for eBay, USPS, UPS etc. *No ink/TTR ribbon requirement, save your money. VRETTI Label printer for shipping packages VRETTI Shipping Label Printer, fast printing VRETTI Thermal Label Printer for warehouse, shipping label, Round label, QR Code, Food Lable How to Print Self-Test Page Please make sure that the printer is connected to the power supply and the label roll is loaded correctly. The printing side should be face up. Press and hold the feed button, until you see the purple and blue light flashing, then release the feed button When I print the label, the label is too small? Please ensure that the label size you use is the same as the label size you set up on the driver. Window: Go to the control panel → devices and printers→click print preferences→option→change print speed and darkness→click apply Mac: Open your file with preview. Click print→select "show details→choose the paper size you want or manage custom sizes" I'm printing blank labels? 1.Please make sure your labels are properly loaded. The printing side is facing up. 2.Ensure your labels are direct thermal labels. 3.It's possible that the printer do not recognize the label size correctly yet.Please calibrate the label in the printer. How to calibrate the label? Turn the power on of the printer,hold the feed button, until you see the red light flashes 3 times then release the feed button. The printer will automatically eject paper，and after the paper is successfully ejected, the machine will automatically calibrate. Print Self-test page Set the label Size Blank Label Calibrate the label Specification Print Method Direct Thermal Max.Print Width 108mm(4.25") Resolution 203dpi Paper Width 25.4-115mm Max.Print Speed 152mm(6")/s Support System Windows,Mac,Linux Media Thickness 0.06-0.254mm Connection USB Only Media Type Continuous, Gap, Black mark Power Adapter AC110-240V, DC 24V 2.5A