1. Introduction
Thank you for purchasing the ACPOTEL 4K Night Vision Binoculars. This device is designed for enhanced observation in various lighting conditions, including complete darkness, making it suitable for outdoor activities such as hunting, camping, security, and wildlife observation. This manual provides detailed instructions for the proper setup, operation, and maintenance of your night vision binoculars. Please read this manual thoroughly before use to ensure optimal performance and longevity of the product.
2. Package Contents
Verify that all items listed below are included in your package. If any items are missing or damaged, please contact customer support.
- ACPOTEL 4K Night Vision Binoculars (Model BNV21)
- USB Charging Cable
- 32GB TF Card
- Neck Strap
- Cleaning Cloth
- User Manual

Image: The ACPOTEL Night Vision Binoculars (Model BNV21) shown with its included accessories: a USB charging cable, a 32GB TF card, a neck strap, and the user manual. The device itself is dark gray with a large viewing screen.
3. Product Overview
Familiarize yourself with the various components of your night vision binoculars.

Image: A top-down view of the ACPOTEL Night Vision Goggles, highlighting the large viewing screen displaying a deer, and the control buttons on the top panel. A smaller inset image shows the front view of the binoculars, revealing the objective lens and infrared illuminator.
Key Components:
- Objective Lens: Captures light from the scene.
- Infrared (IR) Illuminator: Provides invisible light for night vision.
- Control Buttons: Power, IR level, Zoom, Mode, Record/Capture.
- Viewing Screen: 3-inch IPS display for viewing images and videos.
- Eyecup/Blindfold: Provides comfortable viewing and blocks ambient light.
- Tripod Mount: Standard 1/4-inch thread for tripod attachment.
- USB Port: For charging and data transfer.
- TF Card Slot: For memory card insertion.

Image: A diagram illustrating the dimensions of the viewing screen, showing a 3-inch IPS internal screen and a 4.5-inch Ultra HD display screen, with measurements of 16 cm and 5 cm respectively.
4. Setup
4.1 Charging the Device
The binoculars are equipped with a built-in 2000mAh rechargeable battery. Before first use, fully charge the device.
- Connect the supplied USB charging cable to the USB port on the binoculars.
- Connect the other end of the USB cable to a compatible USB power adapter (not included) or a computer's USB port.
- The charging indicator light will illuminate. Once fully charged, the indicator light will change or turn off.
A full charge provides approximately 8 hours of continuous operation at IR level 1, or 5 hours at IR level 3.

Image: An illustration depicting the internal battery (labeled 4000mAh in the image, but product specifications state 2000mAh) and the USB charging cable, indicating the device's operating voltage of 3.7V DC and its ability to recharge and transfer data.
4.2 Inserting the TF Card
The device requires a TF (MicroSD) card for storing photos and videos. A 32GB TF card is included.
- Locate the TF card slot on the side of the binoculars.
- Gently insert the TF card into the slot with the gold contacts facing down until it clicks into place.
- To remove, push the card in slightly until it springs out.
Ensure the device is powered off before inserting or removing the TF card to prevent data corruption.
4.3 Attaching the Neck Strap
Attach the provided neck strap to the designated loops on the binoculars for secure carrying.
4.4 Tripod Mounting (Optional)
For extended observation or stable recording, the binoculars can be mounted on a standard tripod.
- Locate the 1/4-inch tripod screw hole on the bottom of the device.
- Align the binoculars with the tripod's quick-release plate or screw.
- Securely fasten the binoculars to the tripod.

Image: A close-up view of the bottom of the night vision binoculars, showing the threaded mount for tripod compatibility, with an example tripod shown.
5. Operating Instructions
5.1 Power On/Off
- To Power On: Press and hold the Power button (Ⓘ) for a few seconds until the screen illuminates.
- To Power Off: Press and hold the Power button (Ⓘ) again until the screen turns off.
5.2 Day and Night Observation Modes
The device automatically adapts to ambient light conditions. For low-light or complete darkness, activate the infrared illuminator.

Image: A split image demonstrating the clarity of observation in both daytime (color image of deer) and nighttime (monochrome image of deer with crosshairs) using the night vision binoculars, highlighting the adaptive chip for various lighting conditions.
5.3 Adjusting Infrared (IR) Brightness
The binoculars feature a dual IR illuminator with 3 adjustable levels to enhance visibility in darkness.
- In night vision mode, press the IR button to cycle through IR levels (Level 1, Level 2, Level 3, Off).
- Select the appropriate IR level based on the distance and darkness of your observation target. Higher levels provide greater illumination but consume more battery.

Image: A diagram illustrating the dual IR illuminator system, showing both low power and high power IR illuminators. Below, three examples demonstrate the effect of different IR power modes: Covert IR Mode, Medium Power Mode, and High Power Mode, depicting varying levels of visibility in darkness.
5.4 Zoom Control
The device offers 5X optical zoom and 8X digital zoom for detailed observation.
- Use the Zoom In/Out buttons (typically marked with '+' and '-') to adjust the magnification.
- Optical zoom provides clearer images, while digital zoom magnifies the existing image, potentially reducing clarity at higher levels.

Image: An illustration demonstrating the effect of 5X optical zoom and 8X digital magnification on the viewing screen, showing a rabbit in a magnified view with measurement scales and crosshairs.
5.5 Capturing Photos and Videos
The binoculars can capture 1280*720P HD videos and 130 million pixel photos.
- Mode Selection: Press the Mode button to switch between Photo mode and Video mode.
- To Take a Photo: In Photo mode, press the Shutter/Record button once.
- To Record a Video: In Video mode, press the Shutter/Record button once to start recording. Press it again to stop recording.

Image: A collage of four screen captures from the night vision binoculars, showing examples of captured photos (a fox, a cheetah) and recorded videos (a lion and cub, antelopes), demonstrating the device's photo, video, and playback capabilities.
5.6 Playback Function
Review captured photos and videos directly on the device.
- Enter Playback mode using the Mode button.
- Use the navigation buttons (Up/Down or Left/Right) to browse through your files.
- Press the OK/Enter button to view a photo or play a video.
- During video playback, use the same button to pause/resume.
5.7 Focus Adjustment
Rotate the focus wheel (usually located near the objective lens) to achieve a clear image of your target.
6. Maintenance
6.1 Cleaning
- Lenses and Screen: Use the provided cleaning cloth or a soft, lint-free cloth to gently wipe the lenses and screen. For stubborn smudges, use a lens cleaning solution specifically designed for optics. Avoid abrasive materials.
- Body: Wipe the body of the binoculars with a soft, damp cloth. Do not use harsh chemicals or solvents.
6.2 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 (around 50%) and recharge it every few months to maintain battery health.
- Keep the protective caps on the lenses when not in use.
6.3 Battery Care
- Avoid fully discharging the battery frequently.
- Do not expose the device to temperatures below -20°C or above 60°C, as this can damage the battery.
- Use only the supplied USB cable for charging.
7. Troubleshooting
If you encounter issues with your binoculars, refer to the following common problems and solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | Battery is depleted. | Charge the device fully using the USB cable. |
| Image is blurry. | Focus is not adjusted correctly. Lenses are dirty. | Adjust the focus wheel. Clean the objective lens and screen. |
| Poor visibility in darkness. | IR illuminator is off or set too low. | Activate the IR illuminator and increase the IR brightness level. |
| Cannot capture photos/videos. | TF card is full, not inserted, or corrupted. | Check TF card insertion. Delete old files or replace the card. Format the card if necessary (this will erase all data). |
| Screen is blank or frozen. | Software glitch. | Perform a soft reset by holding the power button until the device turns off, then restart. If issue persists, contact support. |
8. Specifications
| Feature | Detail |
|---|---|
| Model | BNV21 |
| Brand | ACPOTEL |
| Optical Zoom | 5X |
| Digital Zoom | 8X |
| Objective Lens Diameter | 35 mm |
| Display Screen | 3-inch IPS Ultra HD |
| Video Resolution | 1280*720P HD |
| Photo Resolution | 130 Million Pixels (interpolated) |
| Infrared Illuminator | Dual IR, 3-level adjustment |
| Viewing Distance (100% Darkness) | Up to 656ft / 200m |
| Storage | 32GB TF Card (included) |
| Battery | 2000mAh Rechargeable (3.7V DC) |
| Operating Time | Up to 8 hours (IR Level 1), 5 hours (IR Level 3) |
| Special Features | Eco-Friendly, LCD Display, Night Vision, Portable, Wide Angle Design, Tripod Compatible |
9. Warranty and Support
9.1 Warranty Information
ACPOTEL products are manufactured to high-quality standards. This product comes with a standard manufacturer's warranty against defects in materials and workmanship. Please refer to the warranty card included in your package or visit the official ACPOTEL website for detailed warranty terms and conditions. Keep your purchase receipt as proof of purchase.
9.2 Customer Support
If you have any questions, require technical assistance, or experience issues not covered in this manual, please contact ACPOTEL customer support.
- Website: Visit the ACPOTEL Store on Amazon
- Email: Refer to your product packaging or warranty card for specific contact information.