1. Introduction
This user manual provides detailed instructions for the setup, operation, maintenance, and troubleshooting of your GOOJPRT MTP-3 80mm BT Thermal Printer. Designed for portable and efficient receipt printing, this device is ideal for various applications including supermarket ticketing and general receipt generation. Please read this manual thoroughly to ensure proper use and longevity of your printer.

2. What's in the Box
Upon opening your GOOJPRT MTP-3 Thermal Printer package, please verify that all the following items are included:
- 1 x GOOJPRT MTP-3 Thermal Printer
- 1 x AC Adapter
- 1 x USB Cable
- 1 x User Manual (this document)
- 1 x Thermal Paper Roll (starter roll)

3. Specifications
The GOOJPRT MTP-3 Thermal Printer is engineered with the following technical specifications:
| Feature | Specification |
|---|---|
| Model | MTP-3 |
| Print Method | Thermal Line Printing |
| Print Speed | 50mm/s |
| Paper Type | Thermal Paper |
| Paper Width | 79.5 0.5mm |
| Print Width | 72mm 0.5mm |
| Paper Roll Diameter | 40mm |
| Connectivity | Bluetooth (BT 2.0+4.0), USB |
| Battery | 7.4V, 1500mAh |
| Standby Time | 5-7 days (168 hours) |
| Dimensions (L*W*H) | 10.5 * 12 * 5.5cm (4.1 * 4.7 * 2.2in) |
| Item Weight | 270g (9.5oz) |
| Printhead Lifespan | 50 kilometers |
| Instruction Set | ESC/POS |

4. Setup
4.1 Battery Installation
Before first use, ensure the battery is correctly installed and charged. The printer comes with a 1500mAh rechargeable battery.
- Open the battery compartment cover located on the bottom of the printer.
- Insert the battery into the compartment, ensuring the contacts align correctly.
- Important: Remove the yellow insulated sticker from the battery contacts before installation if present.
- Close the battery compartment cover securely.

4.2 Loading Thermal Paper
The printer uses 80mm wide thermal paper rolls. Follow these steps to load the paper:
- Gently push the cover open button (usually on the side or top) to open the paper compartment cover.
- Insert the thermal paper roll with the printing side facing outwards (as shown in the correct example in Figure 5). Ensure the roll is centered.
- Pull a small length of paper out beyond the cutter.
- Close the paper compartment cover firmly until it clicks into place.

4.3 Power Connection
To charge the printer or operate it directly from a power source:
- Connect the provided AC adapter to the printer's charging port.
- Plug the AC adapter into a suitable power outlet (110-240V, 50/60Hz).
- The charging indicator light on the printer will illuminate, indicating that the battery is charging.
5. Operating the Printer
5.1 Connecting via Bluetooth
The MTP-3 printer supports Bluetooth 2.0+4.0 for wireless connection with various devices, including iOS, Android, Windows, MAC, and Linux systems.
- Ensure the printer is powered on. The Bluetooth indicator light should be blinking or solid blue.
- On your mobile device or computer, enable Bluetooth and search for available devices.
- Select "MTP-3" or a similar device name from the list to pair. If prompted for a password, enter "0000" or "1234".
- Once paired, the Bluetooth indicator light on the printer will typically become solid, indicating a successful connection.

Watch the following videos for a demonstration of Bluetooth connectivity and printing:
5.2 Printing a Receipt
Once connected, you can print receipts or other thermal paper documents using compatible software or applications on your device.
- Open the printing application on your connected device.
- Select the MTP-3 printer from the list of available printers.
- Prepare the content you wish to print (e.g., a sales receipt, a ticket, or a barcode).
- Initiate the print command from the application. The printer will automatically feed and print the content.

5.3 Print Quality and Features
The MTP-3 printer features a high-performance print head designed for clear and fast printing at 50mm/s. It supports various barcode types including UPC-A, UPC-E, JAN13 (EAN13), JAN8 (EAN8), CODE39, ITF, CODABAR, CODE93, CODE128, QRCODE, and PDF417.

5.4 Application Scenarios
The portable and lightweight design of the MTP-3 makes it suitable for a wide range of applications where on-the-go printing is required.
- Retail: Printing receipts at point-of-sale in supermarkets or small shops.
- Logistics: Generating delivery notes or labels for warehouse and delivery operations.
- Field Services: Issuing invoices or service reports on-site.

6. Maintenance
Regular maintenance ensures optimal performance and extends the lifespan of your printer.
- Cleaning the Print Head: Use a cotton swab lightly dampened with isopropyl alcohol to gently wipe the thermal print head. Allow it to dry completely before use. Clean the print head regularly, especially if print quality degrades.
- Cleaning the Paper Path: Remove any paper dust or debris from the paper path using a soft brush or compressed air.
- Battery Care: To prolong battery life, avoid fully discharging the battery frequently. If storing the printer for an extended period, charge the battery to about 50% and store it in a cool, dry place.
- Storage: Store the printer in a clean, dry environment away from direct sunlight, extreme temperatures, and high humidity.
7. Troubleshooting
If you encounter issues with your GOOJPRT MTP-3 printer, refer to the following common problems and their solutions:
- Printer not powering on:
- Check if the battery is installed correctly and charged.
- Ensure the AC adapter is properly connected to both the printer and a working power outlet.
- Cannot connect via Bluetooth:
- Make sure Bluetooth is enabled on both the printer and your device.
- Ensure the printer is within the effective Bluetooth range.
- Try unpairing and re-pairing the device.
- Restart both the printer and your device.
- Poor print quality / Faint printing:
- Check if the thermal paper is loaded correctly with the printing side facing the print head.
- The thermal paper might be old or of poor quality. Try a new roll.
- Clean the thermal print head as described in the Maintenance section.
- Paper jam:
- Open the paper compartment cover and carefully remove any jammed paper.
- Ensure the paper roll is properly seated and not too tight or loose.
- Close the cover firmly.
- Printer not responding to print commands:
- Verify that the printer is connected to your device (Bluetooth or USB).
- Check the status indicator lights on the printer for any error signals.
- Ensure the printing application is correctly configured and the printer is selected.
8. Warranty Information
The GOOJPRT MTP-3 Thermal Printer comes with a limited warranty. For specific details regarding warranty coverage, duration, and terms, please refer to the warranty card included in your product packaging or visit the official HHOP website. Keep your purchase receipt as proof of purchase for any warranty claims.
9. Customer Support
If you require further assistance or have questions not covered in this manual, please contact HHOP customer support. You can typically find contact information (email, phone, or support portal) on the manufacturer's official website or on the product packaging.