1. Introduction
Thank you for choosing the PUTRIMS Mini Projector S28. This portable projector is designed to provide an immersive viewing experience with its advanced features and versatile connectivity. Please read this manual carefully before using the product to ensure proper operation and to maximize its lifespan.
Key Features:
- 145° Adjustable Stand: Flexible viewing from multiple angles, adapting to various projection surfaces.
- 550 ANSI Brightness & 1080P 4K Support: Advanced 3LCD technology for brighter, clearer, and more vivid images with native 720P resolution.
- Auto Keystone Correction & Electric Focus: Automatic ±30° vertical keystone correction and one-touch electric focus via remote control for crystal-clear visuals.
- 2.4/5G WiFi & 5.2 Bluetooth: Dual-band WiFi for stable content transmission and Bluetooth 5.2 for connecting external audio devices.
- Fully Sealed Optical Engine: Prevents dust buildup, extends lifespan to over 70,000 hours, and eliminates black/white spots.
- Versatile Interfaces: HDMI, USB, and 3.5mm audio ports for wide compatibility with various devices.
- Sleep Timer: Offers 60, 120, and 180-minute auto shut-off options.
2. What's in the Box
Upon opening the package, please verify that all the following items are included:
- PUTRIMS Mini Projector S28
- Remote Control
- HDMI Cable
- Power Cord
- Cleaning Kit
- User Manual (this document)
3. Product Overview
Familiarize yourself with the main components and interfaces of your PUTRIMS Mini Projector S28.

Image: The PUTRIMS Mini Projector S28, showcasing its compact design and adjustable stand. Icons indicate electric focus, 1080P support, auto keystone, and 145° rotatable capability.
Interfaces:
- HDMI Port: For connecting devices like laptops, gaming consoles, TV sticks, etc.
- USB Port: For connecting USB drives for media playback.
- 3.5mm Audio Jack: For connecting external speakers or headphones.
- Power Input: For connecting the power cord.
4. Setup
4.1 Power Connection
- Connect the power cord to the projector's power input port.
- Plug the other end of the power cord into a power outlet.
- The projector will enter standby mode, indicated by a power indicator light.
4.2 Initial Placement
Place the projector on a stable, flat surface. The unique 145° adjustable stand allows for flexible positioning, including projecting onto walls, screens, or even ceilings.

Image: A user enjoying a movie projected onto the ceiling, demonstrating the 145° rotatable stand's versatility for comfortable viewing while lying down.
For optimal viewing, ensure the projection surface is smooth and light-colored. The optimal projection distance is typically between 2-3 meters.
5. Operating Instructions
5.1 Power On/Off
- Power On: Press the power button on the projector or the remote control.
- Power Off: Press the power button again. The projector will shut down safely.
5.2 Focus and Keystone Correction
The S28 projector features automatic vertical keystone correction and electric focus for a clear, rectangular image.

Image: A visual representation of the automatic ±30° vertical keystone correction, ensuring a perfectly rectangular image even when the projector is angled.
- Auto Keystone: The projector automatically corrects vertical distortion (±30°) to ensure a rectangular image.
- Electric Focus: Use the 'F-' and 'F+' buttons on the remote control to sharpen the image. This allows for precise focus adjustment from your viewing position.

Image: The remote control with focus buttons (F-, F+) highlighted, demonstrating one-click electric focus for clear HD images.
5.3 Connectivity (WiFi & Bluetooth)
The S28 supports dual-band 2.4G/5G WiFi and Bluetooth 5.2 for seamless wireless connections.

Image: Illustration of the projector's 5G+2.4G WiFi and Bluetooth 5.2 capabilities, enabling fast and smooth wireless connections to phones and external speakers.
- WiFi Connection: Navigate to the WiFi settings in the projector's menu. Select your desired 2.4G or 5G network and enter the password.
- Bluetooth Connection: Go to Bluetooth settings. Turn on Bluetooth on the projector and your external audio device (e.g., headphones, speakers). Select your device from the list to pair.
5.4 Screen Mirroring
The projector supports wireless screen mirroring for iOS (Airplay) and Android (Miracast) devices. It also supports wired screen mirroring for laptops.
- Wireless: Ensure your device and the projector are connected to the same WiFi network. Select the screen mirroring option on the projector and follow the on-screen instructions for your specific device.
- Wired: Connect your laptop or compatible device to the projector via an HDMI cable for a stable wired connection.
5.5 Streaming Compatibility Notice
Due to HDCP copyright limitations, most projectors, including the S28, do not support wireless mirroring of streaming applications like Netflix or Disney+ directly from phones. For smooth playback of these platforms, it is recommended to use a TV Stick Lite (not included, sold separately) with the projector.
5.6 Zoom Function
Adjust the projection size from 100% down to 50% without moving the projector.

Image: A visual representation of the zoom-out function, allowing the user to reduce the screen size from 100% to 50% digitally.
5.7 Sleep Timer
The built-in sleep timer allows you to set the projector to automatically shut off after a specified duration.
- Access the sleep timer settings in the projector's menu.
- Choose from 60, 120, or 180-minute auto shut-off options.
6. Maintenance
The PUTRIMS S28 Mini Projector features a fully sealed optical engine, which significantly reduces maintenance needs.

Image: A cutaway diagram of the projector's fully sealed optical engine, emphasizing its benefits in preventing dust buildup, reducing noise, extending lifespan, and providing eye care.
- Dust Prevention: The fully enclosed design effectively prevents dust buildup inside the optical system, eliminating common issues like black or white spots on the screen.
- Cleaning: Use the provided cleaning kit to gently clean the projector lens. Do not use abrasive cleaners or solvents.
- Storage: When not in use for extended periods, store the projector in a cool, dry place, away from direct sunlight and extreme temperatures.
7. Troubleshooting
This section addresses common issues you might encounter. For more complex problems, please refer to the warranty and support section.
| Problem | Possible Solution |
|---|---|
| No image or blurry image | Check power connection. Use the electric focus (F-/F+ buttons on remote) to sharpen the image. Ensure the projection surface is flat. |
| Image is trapezoidal/distorted | The projector has automatic vertical keystone correction. Ensure the projector is placed on a stable surface. If manual adjustment is needed, check menu settings. |
| No sound or low volume | Check the projector's volume settings. Ensure external audio devices (if connected via Bluetooth or 3.5mm jack) are powered on and paired correctly. Check source device volume. |
| Cannot connect to WiFi/Bluetooth | Ensure WiFi/Bluetooth is enabled on both the projector and your device. Check network password. Try restarting both devices. Ensure devices are within range. |
| Streaming apps (Netflix, Disney+) not mirroring wirelessly | This is due to HDCP copyright protection. Use a TV Stick (e.g., Amazon Fire TV Stick, Roku Stick) connected to the HDMI port for streaming. |
| Black or white spots on screen | The S28 features a fully sealed optical engine designed to prevent this. If spots appear, contact customer support. |
8. Specifications
Detailed technical specifications for the PUTRIMS Mini Projector S28.
| Feature | Detail |
|---|---|
| Brand | PUTRIMS |
| Model Number | GPSt-01 |
| Display Resolution | Native 1280 x 720P (Supports 1080P & 4K input) |
| Brightness | 550 ANSI Lumens |
| Contrast Ratio | 20,000:1 |
| Connectivity Technology | Bluetooth 5.2, HDMI, USB, Wi-Fi (2.4G/5G) |
| Keystone Correction | Automatic ±30° Vertical |
| Focus Adjustment | Electric Focus (via remote) |
| Adjustable Stand | 145° Rotatable |
| Optical Engine | Fully Sealed |
| Lifespan | Over 70,000 hours |
| Product Dimensions | 7.87 x 7.09 x 7.87 inches |
| Item Weight | 3.53 ounces |
| Color | Black |
9. Warranty and Support
PUTRIMS is committed to providing excellent customer service and support for your S28 Mini Projector.
- 12-Month Money-Back Warranty: For peace of mind regarding your purchase.
- 3-Year Repair Coverage: Comprehensive repair service for eligible issues.
- Lifetime Technical Support: Our dedicated support team is available to assist you with any questions or issues you may encounter throughout the product's lifespan.
Contact Support:
For any technical support or warranty inquiries, please contact us directly:

Image: A graphic representing customer support, highlighting 24/7 availability and hassle-free returns.
Email: support@putrims.com
Please allow up to 24 hours for a response, considering potential time differences.




