1. Introduction
The REVASRI Laser Rangefinder is a versatile optical instrument designed for precise distance, angle, speed, and height measurements. It is ideal for various applications including golfing, hunting, outdoor travel, electricity surveys, and building construction. This manual provides detailed instructions for the safe and effective use of your device.

2. Safety Information
This device uses a laser. Please observe the following safety precautions:
- Laser Class: 905nm Class 1 safe laser, invisible.
- Laser Output: <5mW.
- Do not look directly into the laser beam.
- Do not aim the laser at people or animals.
- Keep out of reach of children.
3. Package Contents
Upon opening your package, please ensure all items are present and in good condition:
- REVASRI Laser Rangefinder (NK-1000 or NK-600 model)
- USB Type-C Charging Cable
- User Manual (this document)
- Carrying Pouch (may vary by package)
- Cleaning Cloth (may vary by package)
4. Product Overview
The REVASRI Laser Rangefinder is designed for portability and ease of use. Its compact size and ergonomic design make it comfortable to hold and operate.


5. Setup
5.1. Charging the Device
The rangefinder comes with a built-in lithium battery and is USB Type-C rechargeable.
- Locate the USB charging port on the device.
- Connect the provided USB Type-C cable to the rangefinder and a suitable USB power source (e.g., computer, wall adapter).
- The charging indicator will show the charging status. Ensure the device is fully charged before first use.

5.2. Power On/Off
- To power on, press the power button (usually the measurement button).
- The device features an intelligent system that automatically enters energy-saving mode and shuts down if there is no operation for 30 seconds.
5.3. Focusing
To achieve a clear view of your target, rotate the manual focusing eyepiece until the image in the viewfinder is sharp.
6. Operating Instructions
6.1. Unit Switching (Meters/Yards)
To switch between Meters (M) and Yards (Y):
- Ensure the device is powered on.
- Press and hold the 'M' button and the measurement button simultaneously for 3-5 seconds.
- The unit displayed in the in-view LCD will change.
6.2. Measurement Modes
The REVASRI Laser Rangefinder offers 7 distinct measurement modes:

- Single Ranging: Measures the straight-line distance to a single target.
- All-in-one Mode: Displays angle, height, horizontal distance, and straight-line distance simultaneously.
- Scan Mode: Allows continuous scanning to measure multiple targets at one press or lock onto a specific target easily.
- Two Point Height: Measures the height between two points.
- Speed Measurement: Measures the speed of a moving target.
- Golf Mode: Automatically calculates the elevation to provide an adjusted distance, and offers a pulse vibration when the flagpole is locked.
- Memory Storage: Stores previous measurements.


7. Maintenance
- Cleaning: Use a soft, dry cloth to clean the exterior of the device. For lenses, use a lens cleaning cloth and solution designed for optical instruments.
- Storage: Store the rangefinder in a cool, dry place, away from direct sunlight and extreme temperatures.
- Battery Care: Recharge the battery regularly, even if not in frequent use, to maintain battery health.
- Operating Conditions: Avoid using the device outside its specified operating temperature (-20~60℃) and humidity (≤80%) ranges.
8. Troubleshooting
If you encounter issues with your REVASRI Laser Rangefinder, please refer to the following common problems and solutions:
- Device not powering on: Ensure the battery is charged. Connect to a power source and try again.
- Inaccurate readings: Ensure the lens is clean and free from obstructions. Verify you are in the correct measurement mode for your application.
- Display unclear: Adjust the manual focusing eyepiece until the display is sharp.
- Unit not switching: Make sure you are pressing both the 'M' button and the measurement button simultaneously for the required duration (3-5 seconds).
If problems persist, please contact customer support for further assistance.
9. Specifications
| Feature | Specification |
|---|---|
| Brand Name | REVASRI |
| Model Number | NK Rangefinder |
| REVASRI Model | NK-C (NK-1000/NK-600 variants) |
| Name | Golf Laser Rangefinder |
| Function | Rangefinder for Hunting |
| Usefulness | Golf Sport, Hunting, Survey |
| Power Type | Rechargeable (Built-in lithium battery) |
| Power | TYPE-C USB rechargeable |
| Laser Class | Class 1 (<1mW) |
| Ranging Method | Semiconductor laser ranging |
| Ranging Scope | 5-600/1000 Yard (depending on model) |
| Measurement Errors | ±1m |
| Ranging Display Mode | In-view LCD display |
| Angle Range | ±90° |
| Telescope Magnification | 6X |
| Objective Lens Diameter | 24MM |
| Exit Pupil Diameter | 3.8mm |
| Exit Pupil Distance | 12mm |
| Focusing Mode | Manual Focusing Eyepiece |
| Size | 96mm x 34mm x 67mm |
| Working Temperature | -20~60℃ |
| Operating Humidity | ≤80% |
| Battery Included | Yes |
| High-concerned chemical | None |
| Certification | CE, FCC, RoHS, WEEE |
| Origin | Mainland China |
10. User Tips
- Elevation Compensation: For hunting from an elevated position (e.g., a tree stand), the rangefinder's Golf Mode (or All-in-one mode) can provide adjusted distances by automatically calculating the elevation, giving you a more accurate yardage to the target.
- Speed Measurement: Yes, this device can measure target speed. Refer to the 'Speed Measurement' mode in the operating instructions.
- Unit Display: The device can display measurements in both meters and yards. Remember to switch units as needed by holding the 'M' and measurement buttons simultaneously.
11. Warranty and Support
REVASRI INSTRUMENT Official Store provides a 12-month after-sales service. The rules are as follows:
- The product is covered for non-artificial damage or damages not caused by improper operation.
- For quality problems, the buyer should contact REVASRI customer service and provide corresponding pictures or videos of the issue.
- Once the quality problems are confirmed, the seller will provide services or free replacement.
- Buyer product issues will be resolved.
The seller reserves the right of final interpretation. Please consult customer service for details.






