1. Introduction
The Marklife D100 is a compact and efficient Bluetooth thermal label printer designed for a wide range of labeling needs. This printer utilizes thermal printing technology, eliminating the need for ink or toner, making it a cost-effective and low-maintenance solution. It supports various label sizes and offers versatile connectivity options, including Bluetooth for mobile devices and USB for computers. This manual provides essential information for setting up, operating, and maintaining your D100 printer.

Figure 1: Marklife D100 printer in use, demonstrating various label types and app integration.
2. Product Features
- Wireless Connectivity: Connects via Bluetooth to iOS and Android devices.
- USB Connectivity: Connects via USB cable to Mac and Windows computers.
- No Ink/Toner Required: Uses thermal printing technology.
- Wide Label Compatibility: Supports label widths from 1.49" to 4.33" (38-110mm).
- User-Friendly App: MarkLife APP offers 5,000+ icons, 3,000+ templates, and 100+ fonts for easy label design.
- Compact Design: Saves desktop space, ideal for various environments.
- Smart Label Identification: Automatically detects label type for precise printing.

Figure 2: Overview of Marklife D100 dimensions and core features.
3. Setup Guide
3.1 Unboxing and Initial Inspection
Carefully remove all components from the packaging. Ensure the printer, power adapter, and any included cables are present and undamaged.
3.2 Loading Labels
- Open the printer cover.
- Place the label roll into the designated compartment, ensuring the labels feed smoothly from the roll and the print side is facing up.
- Adjust the label guides to fit the width of your labels snugly, preventing misalignment.
- Close the printer cover securely.

Figure 3: Proper label loading in the Marklife D100 printer (white model shown).
3.3 Power Connection
Connect the power adapter to the printer's power port and then plug it into a standard electrical outlet.
3.4 Device Connection
3.4.1 Bluetooth Connection (iOS/Android)
- Download the "MarkLife" application from your device's app store.
- Ensure Bluetooth is enabled on your mobile device.
- Open the MarkLife app and follow the in-app instructions to search for and connect to your D100 printer.
3.4.2 USB Connection (Mac/Windows)
- Connect the printer to your computer using a USB cable.
- Install the necessary printer drivers (usually available on the manufacturer's website or included with the printer).
- The printer should appear as an available printing device in your system settings.

Figure 4: Connectivity options for the Marklife D100 printer.
4. Operating Instructions
4.1 Powering On/Off
Press the power button located on the printer to turn it on or off. The indicator light will illuminate when the printer is powered on.
4.2 Printing with the MarkLife App
- Ensure your printer is connected via Bluetooth to your mobile device.
- Open the MarkLife app.
- Select from over 3,000 templates or create a custom label using 5,000+ icons and 100+ fonts.
- Preview your label design.
- Tap the print button in the app to send the label to the printer.

Figure 5: MarkLife App features for efficient label creation.
4.3 Printing from Computer
- Ensure your printer is connected via USB to your computer and drivers are installed.
- Open the document or label design software on your computer.
- Select the Marklife D100 as your printer.
- Adjust print settings as needed (e.g., label size, orientation).
- Initiate the print command.
4.4 Supported Label Sizes
The Marklife D100 supports label widths ranging from 1.49 inches to 4.33 inches (38mm to 110mm). This includes common sizes like 4"x6" (100x150mm) for shipping labels, 2"x2" (50x50mm) for circular labels, and 1.57"x1.18" (40x30mm) for smaller labels.

Figure 6: Examples of supported label sizes and widths.
Video 1: Product demonstration showcasing various labels, ease of use, mobile connection, clear printing, and easy tearing.
5. Maintenance
5.1 Cleaning the Print Head
To ensure 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 powered off and disconnected from power before cleaning.
5.2 General Cleaning
Wipe the exterior of the printer with a soft, dry cloth. Avoid using abrasive cleaners or solvents. Keep the label compartment free of dust and debris.
5.3 No Ink/Toner
As a thermal printer, the Marklife D100 does not require ink cartridges or toner. The only consumable needed is thermal label paper.
6. Troubleshooting
6.1 Printer Not Powering On
- Check if the power adapter is securely connected to both the printer and the electrical outlet.
- Ensure the power outlet is functional.
6.2 Unable to Connect via Bluetooth
- Ensure Bluetooth is enabled on your mobile device.
- Make sure the printer is powered on and within range.
- Restart both your mobile device and the printer.
- Try forgetting the device in your Bluetooth settings and re-pairing.
- Ensure the MarkLife app has Bluetooth permissions.
6.3 Poor Print Quality
- Check if the thermal labels are loaded correctly with the print side facing up.
- Clean the print head as described in the Maintenance section.
- Ensure you are using high-quality thermal labels.
- Adjust print density settings in the MarkLife app or printer driver.
6.4 Labels Not Feeding or Paper Jams
- Ensure the label roll is properly seated and the label guides are adjusted to the label width.
- Check for any obstructions in the label path.
- Make sure the labels are not stuck together or damaged.
- The D100 features "No Jams" technology, but ensure proper loading for best results.
7. Specifications
| Feature | Specification |
|---|---|
| Brand Name | Marklife |
| Model | D100 |
| Type | Thermal Printer |
| Use | Label Maker |
| Signal Connection Type | Bluetooth |
| Interface Type | Bluetooth, USB |
| Supports Network Printing | Wireless |
| Print Speed | 40ppm |
| Double-sided Printing | No |
| Paper Feed Mode | Auto |
| Max Paper Size | 110mm (4.33 inches) |
| Supported Label Width | 1.49" - 4.33" (38 - 110mm) |
| Battery Included | No |
| Dimensions (L x W x H) | 18.21 cm x 9.8 cm x 8.99 cm (7.17" x 3.86" x 3.54") |
| Weight | 1.35 kg |
8. User Tips
- For best results, always use high-quality thermal labels specifically designed for thermal printers.
- Keep your MarkLife app updated to access the latest features, templates, and bug fixes.
- When designing labels, utilize the wide variety of templates and fonts available in the app to create professional and eye-catching designs.
- Ensure the printer is placed on a stable, flat surface during operation.
- If printing multiple labels, ensure sufficient label roll is loaded to avoid interruptions.
9. Warranty and Support
Your Marklife D100 printer is covered by a manufacturer's warranty against defects in materials and workmanship. Please refer to the warranty card included with your product for specific terms and conditions. For technical support, troubleshooting assistance, or warranty claims, please contact Marklife customer service through their official channels.
Always retain your proof of purchase for warranty purposes.





