1. Introduction
This manual provides essential information for the safe and efficient operation of your CACACOL Vidda C3 Ultra 4K Projector. Please read it thoroughly before using the projector and retain it for future reference. This document covers setup, operation, maintenance, troubleshooting, and product specifications.
2. Safety Information
Observe the following safety precautions to prevent damage to the projector and ensure user safety:
- Do not block ventilation openings. Ensure adequate airflow around the projector.
- Do not expose the projector to rain, moisture, or extreme temperatures.
- Avoid looking directly into the projector lens when the lamp is on, as the bright light can cause eye damage.
- Use only the power adapter supplied with the projector.
- Do not attempt to disassemble or repair the projector yourself. Refer all servicing to qualified personnel.
- Keep the projector away from heat sources and direct sunlight.
3. Package Contents
Verify that all items are present in the package:
- Vidda C3 Ultra 4K Projector
- Power Adapter
- Remote Control
- KD3 Google TV Stick (if included with your specific package)
- User Manual (this document)
4. Product Overview
The Vidda C3 Ultra is a 4K projector featuring a Tri-Color Laser optical engine, delivering high brightness and a wide color gamut. It includes advanced image processing and integrated audio.

Figure 4.1: Front view of the Vidda C3 Ultra 4K Projector.
4.1. Projector Components
Familiarize yourself with the main components and connection ports of your projector.

Figure 4.2: Rear view with connectivity ports.
- Lens: Main projection lens.
- Power Button: To turn the projector on or off.
- HDMI Ports: For connecting external devices like Blu-ray players, game consoles, or the KD3 Google TV Stick.
- USB Ports: For connecting USB storage devices or other peripherals.
- Audio Output: For connecting external audio systems (eARC supported).
- Power Input: For connecting the power adapter.
- Ventilation Openings: Ensure these are unobstructed for proper cooling.
5. Setup
5.1. Placement
Position the projector on a stable, flat surface. Ensure the lens is perpendicular to the projection surface for optimal image geometry. The projector features a 0.9–1.5:1 super lossless optical zoom, allowing for flexible placement relative to the screen.

Figure 5.1: Recommended Projection Distances and Screen Sizes.
| Screen Size | Width & Height (cm) | Distance |
|---|---|---|
| 80" | 177*100 | 1.6~2.7m |
| 100" | 221*125 | 2~3.4m |
| 120" | 266*150 | 2.4~4m |
| 150" | 332*187 | 3~5m |
| 200" | 442*249 | 4~6.7m |
| 300" | 664*374 | 6~10m |
5.2. Power Connection
Connect the power adapter to the projector's power input port, then plug the adapter into a wall outlet.
5.3. Initial Power On
Press the power button on the projector or the remote control to turn on the device. Follow the on-screen instructions for initial setup, including language selection and network connection.
5.4. Focus and Keystone Adjustment
The Vidda C3 Ultra features automatic focus, obstacle avoidance, and screen alignment. These functions will typically activate upon startup or when the projector is moved. Manual adjustments can be made through the settings menu if needed.
5.5. Connectivity
- HDMI: Connect external video sources using HDMI cables.
- USB: Insert USB drives for media playback.
- Wi-Fi 7: Connect to your wireless network for internet access and streaming. Navigate to 'Settings' > 'Network' to configure.
- Bluetooth 5.4: Pair with Bluetooth audio devices or other peripherals. Navigate to 'Settings' > 'Bluetooth' to pair devices.
6. Operating Instructions
6.1. Remote Control
Use the provided remote control to navigate the projector's interface. Common buttons include Power, Navigation (Up/Down/Left/Right), OK/Enter, Back, Home, Volume, and Input Source.

Figure 6.1: Projector Remote Control.
6.2. Input Source Selection
Press the 'Input' button on the remote control to switch between connected sources (e.g., HDMI 1, HDMI 2, USB, Internal OS).
6.3. Smart OS Navigation and Google TV Stick
The projector runs on a built-in Android OS with English support. You can navigate applications and settings using the remote control. For access to Google and Netflix licensed Android TV OS global versions, connect the KD3 Google TV Stick to an HDMI input. Switch to the corresponding HDMI input to use the Google TV interface for streaming services like Netflix, Disney+, YouTube 4K, Hulu, and Prime Video.
6.4. Audio Settings
The projector features dual 8W full-range speakers and an independent subwoofer chamber, tuned with Dolby Digital+ and DTS:X support. Adjust volume using the remote. For external audio, connect to the HDMI 2.1 eARC port for 7.1.4-channel surround sound output.
6.5. Projection Settings
Access the projector's settings menu to adjust image parameters:
- Picture Mode: Select from various modes (e.g., Standard, Cinema, Vivid) or customize settings like brightness, contrast, and color.
- HDR Support: The projector supports Dolby Vision, IMAX Enhanced, HDR10+, HLG, and HDR Vivid. Ensure your source content and device settings are configured for HDR output.
- Aspect Ratio: Adjust the image aspect ratio to match your content (e.g., 16:9, 4:3).
- Digital Zoom: Fine-tune the image size if optical zoom is insufficient.
7. Maintenance
7.1. Cleaning
- Lens: Use a soft, lint-free cloth specifically designed for optical lenses. Do not use abrasive cleaners.
- Exterior: Wipe the projector's casing with a soft, dry cloth. For stubborn marks, use a slightly damp cloth and mild detergent, then dry thoroughly.
- Ventilation: Periodically check and clean the ventilation openings to prevent dust buildup, which can affect performance and lifespan.
7.2. Storage
When not in use for extended periods, store the projector in a cool, dry, and dust-free environment. Use the original packaging or a protective case to prevent damage.
8. Troubleshooting
If you encounter issues with your projector, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No image displayed | Power cable loose, incorrect input source, lens cap on. | Check power connections, select correct input, remove lens cap. |
| Image is blurry | Out of focus, projector moved. | Allow auto-focus to adjust or manually adjust focus in settings. |
| No sound | Volume too low, incorrect audio output selected, external device muted. | Increase volume, check audio settings, unmute external device. |
| Remote control not working | Batteries low/dead, obstruction, remote not paired. | Replace batteries, remove obstructions, re-pair remote if necessary. |
| Overheating warning | Blocked ventilation, high ambient temperature. | Ensure vents are clear, operate in a well-ventilated area. |
9. Specifications
Technical specifications for the CACACOL Vidda C3 Ultra 4K Projector:
- Brand: CACACOL
- Model: Vidda C3 Ultra
- Display Resolution: 3840 x 2160 (4K UHD)
- Light Source: MCL39 RGB Laser Optical Engine
- Brightness: 3200 CVIA Lumens (4400 ISO Lumens)
- Contrast Ratio: Native 2000:1, up to 14,000:1 Dynamic
- Color Accuracy: ΔE<0.7, DCI-P3, 110% BT.2020
- HDR Support: Dolby Vision, IMAX Enhanced, HDR10+, HLG, HDR Vivid
- DMD Chip: 0.47" DMD
- Optical Zoom: 0.9–1.5:1 Super Lossless Optical Zoom
- Projection Size: 50"~300"
- Special Features: Auto Focus, Auto Obstacle Avoidance, Auto Screen Alignment, Human-eye Protection Sensors, Digital Keystone Correction
- Audio: Dual 8W Full Range Speakers, Independent Subwoofer Chamber, Dolby Digital+, DTS:X support, HDMI 2.1 eARC (7.1.4-channel surround audio output)
- Cooling System: Integrated Liquid Cooling System
- Processor: MediaTek MT9681 Quad A73
- Memory/Storage: 8GB RAM + 128GB Storage
- Operating System: Built-in Android OS (CN/EN support), compatible with KD3 Google TV Stick
- Wireless Connectivity: Wi-Fi 7, Bluetooth 5.4
- Wired Connectivity: HDMI, USB
- Item Weight: 14.3 pounds
- Product Dimensions: 11.54 x 10.75 x 8.39 inches
10. Warranty and Support
For warranty information and technical support, please refer to the documentation provided at the time of purchase or contact CACACOL customer service. Keep your purchase receipt as proof of purchase for warranty claims.