1. Introduction
Thank you for choosing the Bisofice L81-300DPI Portable A4 Thermal Printer. This compact and versatile printer is designed for convenient, inkless printing on the go, supporting various paper sizes and offering flexible connectivity options. This manual provides essential information for setting up, operating, and maintaining your printer to ensure optimal performance.

Image 1.1: Bisofice L81-300DPI Portable Thermal Printer in use with mobile app and paper rolls.
2. Product Overview
2.1 Key Features
- High-Quality Printing: Features a 300 DPI print head for precise and clear monochrome prints, suitable for various thermal paper types.
- Dedicated Mobile Application: Access numerous templates and materials for editing and printing documents, images, posters, and lists.
- Compact and Portable Design: Measuring 290 x 90 x 60 mm and weighing 756g, this all-in-one printer is ideal for travel, office, study, and home use.
- Multi-Format Paper Support: Equipped with a clip to adjust paper width, supporting 56mm, 77mm, 107mm, 210mm, and 216mm (US Letter) thermal paper.
- Flexible Connectivity: Supports both Bluetooth for mobile devices and USB for PC connections.

Image 2.1: Dimensions and portability of the Bisofice L81-300DPI printer.
2.2 What's in the Box
- 1 x Bisofice L81-300DPI Portable Thermal Printer
- 1 x USB Charging Cable
- 1 x User Manual
- 1 x Roll of Thermal Paper (pre-installed or included separately)
3. Setup
3.1 Printer Components

Image 3.1: Key components of the Bisofice L81-300DPI printer.
- Power Key: Press and hold for 3 seconds to turn the printer on or off.
- USB Interface: Used for charging the printer and connecting to a computer.
- Open Key: Press the left and right sides simultaneously to open the printer cover and access the paper compartment.
3.2 Powering On/Off
To power on the printer, press and hold the Power Key for approximately 3 seconds until the indicator light illuminates. To power off, repeat the same action.
3.3 Loading Thermal Paper
The printer supports both folding thermal paper and thermal paper rolls.

Image 3.2: Loading folding paper and roll paper into the printer.
- Press the Open Key on both sides of the printer simultaneously to open the top cover.
- For folding paper, insert the stack into the paper tray, ensuring the printable side faces the print head.
- For roll paper, place the roll into the designated slot, feeding the leading edge of the paper through the output slot. Use the adjustable clip to secure the paper width if necessary.
- Close the top cover firmly until it clicks into place.
3.4 Connecting to Mobile Devices (Bluetooth)
To print from your smartphone or tablet, use the dedicated 'Luck Jingle' application.

Image 3.3: Bluetooth connection steps for mobile devices.
- Download the 'Luck Jingle' app from your device's app store:
App Store (iOS) | Google Play (Android) - Ensure your printer is powered on and Bluetooth is enabled on your mobile device.
- Open the 'Luck Jingle' app and follow the in-app instructions to search for and connect to your printer via Bluetooth.
- Once connected, you can begin printing.
3.5 Connecting to Computers (USB)
To print from a PC or Mac, connect the printer via USB and install the necessary drivers.

Image 3.4: USB connection steps for computers.
- Connect the printer to your computer using the provided USB cable.
- Download the appropriate drivers for Windows or Mac from the official website: Bisofice Driver Download
- Install the drivers according to the on-screen instructions.
- After successful installation, you can select the Bisofice L81-300DPI as your printer and begin printing.
4. Operating Instructions
4.1 Printing Process
Once your printer is connected via Bluetooth or USB and paper is loaded, you can initiate printing from your chosen device. Use the 'Luck Jingle' app for mobile printing or your computer's print function for PC printing.
4.2 Paper Compatibility
The Bisofice L81-300DPI printer is designed to work with various sizes of thermal paper, including 56mm, 77mm, 107mm, 210mm, and 216mm (US Letter/A4). Ensure you use thermal paper as this printer does not require ink cartridges.
4.3 Print Quality
The printer features a 300 DPI resolution, providing clear and sharp monochrome output. This is suitable for documents, text, and simple graphics.

Image 4.1: Comparison of 304DPI print quality.
5. Maintenance
5.1 Battery Management
The printer is equipped with a built-in 2600mAh battery, allowing for approximately 3 hours of continuous printing or up to 400 sheets on a full charge. Charge the printer using the provided USB-C cable connected to a power source or computer.

Image 5.1: Battery capacity and charging features.
5.2 Cleaning
To maintain optimal performance, periodically clean the exterior of the printer with a soft, dry cloth. Avoid using abrasive cleaners or solvents. If print quality degrades, gently wipe the print head with an alcohol swab (ensure the printer is off and cooled down) to remove any dust or residue.
6. Troubleshooting
If you encounter issues with your Bisofice L81-300DPI printer, please refer to the following common solutions:
- Printer Not Turning On: Ensure the battery is charged. Connect the printer to a power source using the USB-C cable and try turning it on again.
- Cannot Connect via Bluetooth: Make sure Bluetooth is enabled on your mobile device and the printer is within range. Restart both the printer and your device. Verify that the 'Luck Jingle' app has Bluetooth permissions.
- Cannot Connect via USB: Check that the USB cable is securely connected to both the printer and the computer. Ensure the correct drivers are installed on your computer. Try a different USB port or cable.
- Poor Print Quality (Faded/Blurry): Ensure you are using high-quality thermal paper. Check if the paper is loaded correctly with the printable side facing the print head. Clean the print head as described in the Maintenance section.
- Paper Not Feeding: Open the cover and ensure the paper is loaded correctly and not jammed. Check for any obstructions in the paper path.
- Printer Not Printing: Verify that the printer is connected to your device and the print command was successfully sent. Check for any error messages on your device or the printer's indicator lights.
If the issue persists, please refer to the official Bisofice support resources or contact customer service.
7. Specifications
| Feature | Specification |
|---|---|
| Brand | Bisofice |
| Model | L81-300 |
| Product Dimensions | 290 x 90 x 60 mm |
| Item Weight | 756 g |
| Print Technology | Thermal |
| Printer Output | Monochrome |
| Maximum B&W Print Resolution | 304 DPI |
| Maximum Supported Paper Size | A4 (210 x 297mm), US Letter, 2", 3", 4", 8" |
| Connectivity Technology | Bluetooth, USB |
| Compatible Devices | Smartphones, Tablets, Desktop Computers, Laptops |
| Battery Capacity | 2600 mAh (Lithium Ion) |
| Maximum Print Speed (B&W) | 10 ppm |
| Memory Capacity | 64 MB |
| Additional Features | Portable, Wireless, Inkless |
8. Warranty and Support
The Bisofice L81-300DPI Portable A4 Thermal Printer comes with a Limited Warranty. For specific warranty terms and conditions, please refer to the documentation included with your product or contact Bisofice customer support. For technical assistance or further inquiries, please visit the official Bisofice website or contact their customer service department.


