1. Product Overview
The TATTMUSE A28U Portable Thermal Printer is a compact, inkless printing solution designed for convenience and portability. It utilizes advanced thermal direct technology to produce sharp, clear black and white prints without the need for ink cartridges, toner, or ribbons. This printer supports various paper sizes including US Letter, A4, B5, and A5, making it versatile for different printing needs. Its lightweight design, long-lasting battery, and Bluetooth connectivity ensure efficient printing on the go.

Image: TATTMUSE A28U Portable Thermal Printer, showcasing its sleek design.

Image: A user happily printing with the inkless portable printer, contrasting with a frustrated user struggling with a traditional printer.
2. Package Contents
Please verify that all items are present in your package:
- Portable Printer
- US Letter Thermal Papers (10 PCS)
- User Manual
- USB-C Cable
- USB-C Adapter

Image: Visual representation of the TATTMUSE A28U printer and its included accessories.
3. Setup Instructions
3.1 Power On and Charging
- To power on the printer, press and hold the power button for 3 seconds. The status indicator light will illuminate.
- If the indicator light does not turn on, charge the printer for at least 1 hour using the provided USB-C cable and a 5V/2A adapter (adapter not included).
- Once the printer is powered on, double-click the power button to eject any protective paper that may be inside.
Video: Quick Start Guide for TATTMUSE A28U Portable Printer, demonstrating power on, charging, and initial paper handling.
3.2 Loading Thermal Paper
The TATTMUSE A28U printer exclusively uses specialized thermal paper. Regular copy paper is not supported.
- Ensure you are using thermal paper. Identify the non-printing side (usually indicated by a slight sheen or a label).
- Insert the thermal paper into the paper guide slot with the non-printing side facing downwards.
- Center the paper within the slot. The printer will automatically pull the paper in when correctly inserted.
- When the indicator light turns green, the printer is ready for printing.

Image: The TATTMUSE A28U printer demonstrating support for US Letter, A4, B5, and A5 thermal paper sizes.

Image: The TATTMUSE A28U printer showing compatibility with both single sheet and continuous thermal paper types.
4. Operating Instructions
4.1 Connecting via Bluetooth (Mobile Devices)
- Download the "Phomemo" app from your device's app store (App Store for iOS, Google Play for Android). You can also scan the QR code provided in the quick start guide or visit https://downloadapp.qu-in.life/MrIn-Phomemo/.
- Enable Bluetooth on your mobile device.
- Open the "Phomemo" app and follow the on-screen prompts to connect to your A28U printer. Select "A28U" from the list of available devices.
- Once connected, you can select documents, images, or use other app features to prepare your print job.

Image: The "Phomemo" app interface on a smartphone, showing options for printing documents, images, and other tools.

Image: Step-by-step guide for connecting the TATTMUSE A28U printer via Bluetooth using the Phomemo app.
4.2 Connecting via USB (Laptops/Computers)
- Download the necessary printer drivers from https://a28ulabelife.cc. Install the drivers on your computer.
- Connect the A28U printer to your computer using the provided USB-C cable.
- Once the drivers are installed and the printer is connected, select the A28U printer from your computer's print dialogue box and initiate your print job.

Image: Step-by-step guide for connecting the TATTMUSE A28U printer to a computer via USB, including driver download instructions.
Video: Demonstration of the TATTMUSE A28U Portable Thermal Printer in action, highlighting its ease of use and print quality.
5. Maintenance
5.1 Cleaning the Print Head
To maintain optimal print quality, regularly clean the print head. Use a soft, lint-free cloth lightly dampened with isopropyl alcohol. Gently wipe the print head surface. Ensure the printer is turned off and disconnected from power before cleaning.
5.2 Battery Care
The A28U printer features cool charging technology to extend battery lifespan. To maximize battery health:
- Avoid extreme temperatures during charging and storage.
- Use only the original USB-C cable for charging.
- If storing the printer for an extended period, charge it to about 50% and store in a cool, dry place.

Image: Illustration of the printer's cool charging technology, highlighting temperature reduction and NTC precision control for extended battery life.
6. Troubleshooting
6.1 Printer Not Turning On
- Ensure the battery is charged. Connect the printer to a power source and allow it to charge for at least 1 hour.
- Press and hold the power button for 3 seconds.
6.2 Paper Jam
The A28U printer features a double-tap auto paper return technology to prevent manual jam removal.
- If paper gets stuck, double-tap the power button. The printer will attempt to automatically reverse and eject the paper.
- Ensure paper is loaded correctly and is not wrinkled or damaged.

Image: Demonstration of the printer's upgraded jam reversal function, showing how a double-tap automatically retracts stuck paper.
6.3 Poor Print Quality
- Ensure you are using high-quality thermal paper.
- Clean the print head as described in the Maintenance section.
- Check the print density settings in the "Phomemo" app or your computer's print dialogue.

Image: Diagram illustrating the upgraded print head with dual-zone heat control, ensuring 99% uniform print density for clear documents.
7. Specifications
| Feature | Specification |
|---|---|
| Brand | TATTMUSE |
| Model Name | A28U |
| Connectivity Technology | Bluetooth, USB |
| Printing Technology | Thermal |
| Printer Output | Monochrome (Black) |
| Max Print Speed Monochrome | 7 ppm |
| Maximum Black and White Print Resolution | 203 dpi |
| Supported Media Sizes | Letter (8.5 x 11 inches), A4, B5, A5 |
| Printer Ink Type | Inkless |
| Product Dimensions | 2.44"D x 1.45"W x 10.55"H |
| Item Weight | 1.85 pounds |
| Batteries | 2 x 12V batteries (included) |

Image: Visual comparison of the A28U printer's size and weight, highlighting its compact and lightweight design.
8. Warranty and Support
For warranty information and technical support, please refer to the documentation included with your product or visit the official TATTMUSE website. You may also contact TATTMUSE customer service directly for assistance with product issues or inquiries.

