1. Introduction
Thank you for choosing the REVASRI Golf Laser Rangefinder. This device is designed to provide accurate distance measurements for golf and other outdoor sports, featuring advanced functions like slope compensation, flagpole locking, and unit switching. With its 6.5X magnification, acquiring your target is easy and precise.

2. Safety Warnings and Precautions
Please read and understand all safety instructions before using the device to prevent injury or damage.
2.1. Laser Safety
- This device uses a Class 1 laser (905nm, <1mW), which is safe for the eyes under normal operating conditions.
- Do not view the laser emissions for long periods of time with magnified lenses.
- Do not aim the laser directly at other people or animals.
- Avoid direct sunlight to the eyepiece to prevent damage to the eyepiece display or internal components.

2.2. Battery Safety
- The product contains a built-in rechargeable Li-ion battery (3.7V).
- Do not put the battery near fire or dispose of it in fire, as this may cause an explosion.
- If the battery protective cover is damaged, discontinue use immediately to prevent explosion or leakage.
2.3. General Precautions
- Store the device within the recommended temperature range of -20°C to 50°C.
- When not in use for a long time, store the device in a dry environment.
- The equipment contains electrical and electronic components and should be disposed of at community-provided waste collection points, not with ordinary household waste.
3. Setup and Charging
3.1. Charging the Device
The REVASRI Golf Laser Rangefinder is equipped with a built-in lithium-ion battery and supports Type-C direct charging.
- Locate the USB-C charging port on the side of the device.
- Connect the provided USB-C cable to the rangefinder and a suitable USB power source (e.g., wall adapter, computer USB port).
- The device will indicate charging status (e.g., an indicator light). Ensure the device is fully charged before first use.

3.2. Powering On/Off
- Press the Power Button (
) to power on the device. - The device will automatically power off after 30 seconds of inactivity to conserve battery life.
3.3. Focusing
The rangefinder features manual focusing. Rotate the eyepiece knob (Eyepiece Knob) to adjust the focus until the display is clear for your vision.
4. Operating Instructions
4.1. Measurement Modes
The rangefinder offers various measurement modes suitable for different scenarios:
- Golf Mode: Designed for golf, providing accurate distances to flags and accounting for slope.
- Hunting Mode: Suitable for general outdoor distance measurement.

4.2. Slope Compensation
The slope function can be easily toggled on or off using the dedicated Slope Switch. When activated, the device calculates and displays the slope-adjusted distance (SA Value), which is the recommended hitting distance, taking into account the elevation changes.
- To use Slope On:
- Ensure the Slope Switch is in the 'On' position. A '1' icon will appear on the display.
- Press the Power Button to start.
- Select the target object and aim.
- Press the Power Button again to measure. The display will show the line of sight distance and the slope-adjusted distance.
- To use Slope Off:
- Ensure the Slope Switch is in the 'Off' position.
- Press the Power Button to start.
- Select the target object and aim.
- Press the Power Button again to measure. The display will show the straight line distance.


4.3. Flagpole Lock and Vibration
When measuring a flagpole, especially with a busy background, the single ranging mode might not accurately identify the flagpole. To ensure accuracy:
- Press and hold the Power Button to enter scanning measurement mode.
- Scan the background and then the flagpole.
- When the flagpole is recognized and locked, the flagpole icon (
) will flash, the rangefinder will vibrate, and the measurement data will be displayed.
4.4. Unit Switching (Meter/Yard)
The device allows you to switch between Meters (M) and Yards (Y) to suit your preference.
- To switch units, long press the 'M' (Switch Unit) button and the measurement key simultaneously.

5. LCD Display Indicators
The in-view LCD display provides essential information during measurement:

- Angle: Displays the measured angle.
- Target Indicator: Helps in aiming at the target.
- Slope Distance: The direct distance from the rangefinder to the target object.
- SA Value (Recommended hitting distance): The slope-adjusted distance.
- Lightning Icon: Flashes continuously during measurement.
- Flagpole Icon: Flashes once after locking the flagpole.
- Distance Unit M/Y: Indicates whether the unit is Meters or Yards.
6. Cleaning and Daily Maintenance
The lenses of your laser rangefinder are fully multi-coated for optimal light transmission. Proper cleaning and maintenance will ensure the longevity and performance of your device.
- Cleaning Lenses: To remove fingerprints or smudges, gently clean the lenses with a lens demisting cloth in a circular motion.
- Cleaning Solution: If using a cleaning solution, apply it to the wipe cloth first, not directly onto the lens.
- General Care: Keep the device clean and free from dirt. Store it in its protective case when not in use.
7. Technical Specifications
| Feature | Specification |
|---|---|
| Model Number | NKG-600 / NK-1000 |
| Product Name | Golf Laser Rangefinder |
| Ranging Method | Semiconductor Laser Ranging |
| Ranging Distance | 5-600M (NKG-600) / 5-1000M (NK-1000) |
| Measurement Accuracy | ±1M |
| Magnification | 6.5X |
| Field Of View | 6.5° |
| Object Diameter | 24MM |
| Exit Pupil Diameter | 3.1mm |
| Exit Pupil Distance | 12.1mm |
| Focusing Mode | Manual Focusing (Rotating mirror) |
| Eyepiece Lens Quality | Multilayer Coated |
| Ranging Display Mode | In-view LCD display |
| Laser Safety | 905nm Class 1 laser, laser output <5mW |
| Power Supply | Built-in Li-ion battery (3.7V), Type-C Charging |
| Battery Included | Yes |
| Working Temperature | -20~50℃ |
| Operating Humidity | ≤80% |
| Product Size | 96*34*67mm |
| High-concerned chemical | None |
| Certification | CE, RoHS, WEEE |
8. User Tips
- Portability: The compact size (96*34*67mm) and lightweight design make this rangefinder highly portable for any outdoor activity.
- Battery Life: To maximize battery life, remember to power off the device manually if you finish using it before the auto-shutdown feature activates.
- Slope Feature: Utilize the slope compensation feature for more accurate 'play as' distances on hilly terrain, which can significantly improve your golf game.
9. Troubleshooting
If you encounter issues with your rangefinder, please refer to the following common problems and solutions:
- Device does not power on:
Ensure the battery is charged. Connect the device to a power source using the USB-C cable and allow it to charge for some time. - Inaccurate measurements:
Check if the lens is clean. Smudges or dirt can affect accuracy. Ensure you are using the correct measurement mode (e.g., Slope On/Off). For flagpole lock, ensure you scan the area properly. - Display is unclear:
Adjust the eyepiece knob to focus the display for your vision. - Unit not switching:
Ensure you are long-pressing both the 'M' (Switch Unit) button and the measurement key simultaneously to switch between Meters and Yards.
If the problem persists, please contact customer support for further assistance.
10. Warranty and Support
10.1. After-sales Service
REVASRI INSTRUMENT Official Store provides a 12-month after-sales service for this product. This service covers non-artificial damage or damages not caused by improper operation.

For quality problems, please contact REVASRI customer service and provide relevant pictures or videos. After confirming the quality problem, the seller will provide services or free replacement. The seller reserves the right of final interpretation.
10.2. Additional Resources
For a more detailed user manual, you can refer to the official PDF document: View User Manual (PDF)



