GOYOJO 8x40 Marine Binoculars User Manual

1. Product Overview

The GOYOJO LRB20 8x40 Marine Binoculars are designed for adults, featuring an integrated laser rangefinder and electronic compass. These IP65 waterproof binoculars offer 8x optical magnification and a wide 8° field of view, making them suitable for various outdoor activities such as birdwatching, sailing, boating, and fishing. The device utilizes a 905nm pulse TOF (Time-of-Flight) principle for accurate distance, height, and angle measurements.

Figure 1: GOYOJO 8x40 Marine Binoculars with laser ranging capabilities, suitable for natural observation, hunting, and outdoor adventure.

2. Package Contents

Please check the package to ensure all items are present:

• GOYOJO 8x40 Marine Binoculars (LRB20)
• User Manual (this document)
• Carrying Case (if included with purchase)
• Neck Strap (if included with purchase)
• Lens Cleaning Cloth (if included with purchase)

3. Setup and Initial Use

3.1. Battery Installation

The binoculars come with a built-in battery. Ensure it is charged before first use. The battery working voltage is 3.7V.

3.2. Power On/Off and Ranging

To turn on the device and initiate ranging, click the designated button (labeled '01' in Figure 2). The device will automatically shut off after 30 seconds of no operation to conserve battery life.

Figure 2: Binocular Controls and Features. '01' is the power/ranging button, '02' is the unit switching button and tripod interface, '03' is the battery cover.

3.3. Focus Adjustment

For clear viewing, adjust the focus by rotating the diopter clockwise or counter-clockwise. Continue adjusting until the images for both the left and right eyes are clearly focused.

Figure 3: Diopter adjustment for clear scenery observation.

3.4. Unit Switching

To switch between meters (M) and yards (Y) for measurement units, click the button labeled '02' (refer to Figure 2). This button also serves to exit the compass function.

3.5. Tripod Mounting

The binoculars feature a 1/4" tripod interface. Unscrew the cover (labeled '02' in Figure 2) to attach the binoculars to a compatible tripod for stable, long-duration observation.

4. Operating Instructions

4.1. General Observation

The 8x optical magnification and 40mm objective lens provide bright and clear images. The 8° field of view allows for a broad perspective, reducing eye fatigue during extended viewing.

Figure 4: Large eyepieces for more comfortable viewing and clearer imaging.

4.2. Laser Rangefinder Usage

The integrated laser rangefinder can measure distances up to 1500 meters using a 905nm pulse TOF principle. To take a measurement, aim the crosshairs at your target and press the ranging button (01). The distance will be displayed on the internal LCD screen.

Figure 5: 1500M Laser Rangefinder in action.

Figure 6: 905nm pulse TOF principle for accurate measurements.

4.3. Measurement Modes

The binoculars support various measurement modes:

• Distance Measurement: Measures the linear distance to the target.
• Height Measurement: Calculates the height of an object.
• Angle Measurement: Determines the angle to the target.
• Continuous Measurement: Allows for real-time tracking of moving targets or scanning an area.
• Golf Flagstick Observation: Specialized mode for golf, often with flag-lock technology.

Figure 7: Various Measurement Modes.

4.4. Electronic Compass

The built-in electronic compass provides directional information, displayed on the internal screen. This aids in navigation and orientation during outdoor activities.

4.5. Screen Display Instructions

The internal LCD screen provides clear information. Key indicators include:

• Compass indication (N, S, E, W)
• Distance measurement (in M or Y)
• Measurement center point (crosshairs)
• Battery power level
• Angle measurement
• Working status / Height

Figure 8: Screen Display Instructions.

5. Maintenance

5.1. Cleaning

• Use the provided lens cleaning cloth (or a soft, lint-free cloth) to gently wipe the lenses. Avoid using abrasive materials or excessive force.
• For stubborn smudges, a small amount of lens cleaning fluid designed for optics can be applied to the cloth, not directly to the lens.
• Clean the body of the binoculars with a soft, damp cloth. Do not use harsh chemicals.

5.2. Storage

• Store the binoculars in a cool, dry place, away from direct sunlight and extreme temperatures.
• If storing for an extended period, ensure the battery is partially charged (not fully depleted or fully charged) and consider removing it if possible (though this model has a built-in battery).
• Use the carrying case to protect the binoculars from dust and physical damage.

5.3. Waterproofing

The binoculars are IP65 waterproof rated, meaning they are protected against dust ingress and low-pressure water jets from any direction. While they can withstand splashes and light rain, they are not designed for submersion.

6. Troubleshooting

6.1. Compass Showing Wrong Direction

If the electronic compass is displaying incorrect directions, it may need calibration. Refer to the device's internal menu or specific button combinations (often involving holding the compass button) to initiate calibration. Ensure you are in an open area away from strong magnetic fields (e.g., large metal objects, power lines) during calibration.

6.2. No Display / Device Not Turning On

• Ensure the battery is sufficiently charged. Connect the binoculars to a power source using the appropriate charging cable.
• Press and hold the power button (01) for a few seconds to ensure it's not just a quick press.
• If the issue persists after charging, contact customer support.

6.3. Inaccurate Ranging Measurements

• Ensure a clear line of sight to the target. Obstructions can interfere with laser accuracy.
• Hold the binoculars steady during measurement. Using a tripod (see Section 3.5) can significantly improve stability and accuracy, especially for long distances.
• Verify that the measurement unit (meters/yards) is set correctly for your needs.
• Avoid measuring through glass or other reflective surfaces, which can cause false readings.

7. Specifications

Figure 9: Detailed Product Specifications.

8. User Tips

• Compass Calibration: If you notice the compass is inaccurate, perform a calibration in an open area, away from large metal objects or strong electromagnetic fields, to ensure precise directional readings.
• Stable Measurements: For the most accurate distance readings, especially at longer ranges, try to keep the binoculars as steady as possible. Using a tripod is highly recommended for stationary targets.
• Environmental Awareness: While IP65 rated, avoid prolonged exposure to heavy rain or submersion. Always wipe the binoculars dry after exposure to moisture.
• Eyepiece Comfort: Adjust the eyecups to your preference for comfortable viewing, especially if you wear glasses.

9. Warranty and Support

For warranty information, technical support, or service inquiries, please refer to the documentation provided at the time of purchase or contact your retailer. Keep your proof of purchase for any warranty claims.