1. Introduction
The DUKA ATuMan TR1 is a versatile and compact device designed for precise distance, angle, and height measurements. Combining the functionality of a laser rangefinder and a telescope, it is ideal for a wide range of applications including golf, hunting, engineering, leisure travel, and general outdoor activities. Its ergonomic design ensures comfortable one-handed control, while the high-definition optical system provides clear and bright images.


2. Safety Information
The DUKA ATuMan TR1 uses a Class I invisible laser. Please observe the following safety precautions:
- Do not stare directly into the laser beam or point it at others.
- Avoid disassembling the device, as this may expose you to laser radiation.
- Keep the device out of reach of children.
- Use the device only as intended to prevent potential hazards.
3. Package Contents
Upon opening your DUKA ATuMan TR1 package, you should find the following items:
- DUKA ATuMan TR1 Laser Rangefinder Telescope
- Type-C Charging Cable
- User Manual (this document)
- (May include a carrying pouch or lanyard, depending on the specific package)
4. Initial Setup
4.1 Charging the Device
The TR1 is equipped with a built-in 420mAh Li-ion battery. Before first use, or when the battery is low, charge the device using the provided Type-C cable.
- Connect the Type-C charging cable to the charging port on the device.
- Connect the other end of the cable to a standard USB power adapter (5V DC) or a computer USB port.
- The charging indicator will show the charging status. A full charge provides up to 210 minutes of continuous use under laboratory conditions (at 100m distance, normal light level, and 5 seconds/time frequency). Actual endurance may vary based on environment and usage.

4.2 Diopter Adjustment
The TR1 features a ±6D diopter adjustment, allowing users with nearsightedness, farsightedness, or presbyopia to observe clearly with bare eyes. Rotate the eyepiece to adjust the focus until the image appears sharp.

4.3 Focusing
The device is equipped with a large diameter soft silicone focusing wheel for precise and flexible targeting. Rotate this wheel to bring your target into sharp focus.

5. Operating Instructions
5.1 Power On/Off
Press and hold the power button (usually located near the eyepiece or on the side) to turn the device on or off. The display will illuminate when powered on.
5.2 Measurement Modes
The TR1 offers multiple measurement modes, which can typically be switched by pressing a mode button (refer to device for exact button layout). The device provides accurate distance measurement with an accuracy of ±(0.5m + D*0.2%), where D is the measurement distance.
- Straight Line Distance (L Mode): Measures the direct distance from the device to the target.
- Horizontal Distance (H Mode): Measures the horizontal projection of the distance to the target, useful for golf or construction.
- Vertical Distance (V Mode): Measures the vertical height to the target, useful for determining object heights.



Some models may also include features like Slope Compensation, Flagpole Lock, and Speed Measurement. Refer to the specifications table for your specific model's capabilities.



6. Maintenance
6.1 Cleaning
- Use a soft, clean cloth to wipe the exterior of the device.
- For lenses, use a lens cleaning cloth and specialized lens cleaning solution. Do not use abrasive materials or harsh chemicals.
- Ensure the device is dry before storing.
6.2 Storage
- Store the rangefinder in a cool, dry place away from direct sunlight and extreme temperatures.
- If not used for extended periods, charge the battery periodically to maintain its health.

7. Troubleshooting
- Device not powering on: Ensure the battery is charged. Connect to a power source and try again.
- Inaccurate measurements: Ensure a clear line of sight to the target. Avoid obstructions. Make sure the lens is clean.
- Display not clear: Adjust the diopter and focusing wheel until the image is sharp.
- Short battery life: Ensure the device is fully charged. Battery performance can be affected by extreme temperatures.
8. Specifications
The DUKA ATuMan TR1 is available in 800m and 1200m measurement range versions. Please refer to the table below for detailed specifications.

| Feature | 800m Model | 1200m Model |
|---|---|---|
| Product Name | TR1 Telescope Rangefinder | |
| Brand Name | MIJIA / DUKA | |
| Model Number | TR1 | |
| Measuring Distance | 3-800 meters | 3-1200 meters |
| Measuring Accuracy | ±(0.5m + D*0.2%) | |
| Magnification | 6X | |
| Laser Type | Class I invisible laser | |
| Field of View | 6.5 degrees | |
| Inclination (Tilt Angle) | +89 degrees ~ -89 degrees | |
| Battery | 420mAh Li-ion | |
| Power Connector | Type-C DC 5V | |
| Dimensions | 108 * 61 * 42mm | |
| Net Weight | 129g | |
| Unit | m / yd | |
| Linear Distance | ✓ | ✓ |
| Horizontal Distance | ✓ | ✓ |
| Vertical Distance | ✓ | ✓ |
| Slope Compensation | ✗ | ✓ |
| Flagpole Lock | ✗ | ✓ |
| Speed Measurement | ✗ | ✓ |
9. User Tips
- For best accuracy, hold the rangefinder as steady as possible or brace it against a stable surface.
- Ensure a clear line of sight to your target. Obstacles like dense fog, heavy rain, or very small targets can affect measurement accuracy.
- When measuring small targets like flagpoles, use the flagpole lock feature (if available on your model) to ensure the laser locks onto the closest object.
- Practice using the different measurement modes to become familiar with their functions and applications.
- Keep the lenses clean to maintain optimal viewing clarity and measurement precision.
10. Warranty and Support
For warranty information, please refer to the documentation provided at the time of purchase or contact your retailer. If you encounter any issues or require technical support, please reach out to the manufacturer's customer service or the store where you purchased the product.





