Features: Low voltage power supply for driving thermal printer head; Small size and lightweighted Voltage equal to the logical voltage, or drived by a single 5V power cord;. High resolution printing, high density print head for clear and accurate printing. Fast speed printing Set different print speeds as required depending on the driving force and sensitivity of the thermal paper. Easy paper loading Removable rubber roller structure makes paper loading easily. Low noise Thermal dot printing is used to ensure low noise printing. Specifications: Operating Voltage Ranging： 4.2V-9.5V Size: about 68.5mmx 36.5mmx22.0mm/2.7x1.44x0.87in Component： Plastic For PT48FS-B Pos Machine Printhead Comatible LJGADH04 TSP390 Package Includes: 1PC Pos Machine Printhead note: Due to the problemsof lighting effects, there will be tolerances in product, please understand. Please allow 0-1cm error due to manual measurement