Feature: 1. SPECIFICATIONS: 58mm embedded micro thermal printer with excellent performance and clear printing, widely used in medical equipment, testing instruments, etc. 2. GOOD COMPATIBILITY: This thermal printer can be connected to MCU, for Android, for Linux, for Windows system, making it easy to print text, images, barcodes, QR codes, etc. 3. INTERFACE TYPE: This thermal printer provides RS232 TTL and USB interface, defaults to RS232, and provides a set of electrical adjustment and POS printing instructions. 4. MULTIPLE USAGES: Can easily create bold, underline, inverted text, variable line spacing, left center and right alignment, adjustable height barcodes, and custom QR codes. 5. EASY OPERATION: Open the paper bin cover on the front panel to replace the paper, and fix the printer on the device by twisting the screws on both sides of the paper box to move the slider. Specification: Item Type: Thermal Printer Resolution: 203dpi Printing Method: Line Thermal Sensitive Input Mode: Black White Printing Width: 58mm / 2.3in Printing Speed: 80mm/s Power Supply: 5-9V Working Current: 2.5A Point Density: 384 Points Per Line Service Life: 50km Interface Type: RS232 and USB Printing Content: Text, graphic, character, curve, one dimensional code. Package List: 1 x Thermal Printer2 x Thermal Cables1 x Paper Roll1 x USB Connection Cable