1. Introducció
The EZCast J4 Portable Projector is a compact, rechargeable device designed for versatile media projection. Featuring DLP technology, 300 lumens brightness, and 1080P resolution support, it delivers clear images up to 100 inches. Its built-in battery provides up to 5 hours of playtime, making it ideal for outdoor use and business travel. The projector supports 2.4G/5G WiFi for screen mirroring and offers multiple connectivity options including HDMI, USB, and an audio jack.
2. Què hi ha a la caixa
Upon unboxing your EZCast J4 Portable Projector, please ensure all the following items are present:
- EZCast J4 Portable Projector Unit
- Adaptador d'alimentació
- Control remot
- Suport del trípode
- Bossa de transport
- Guia d'inici ràpid

Image: The EZCast J4 Portable Projector shown with its included accessories, including the main unit, remote, power adapter, and tripod.
Video: This video demonstrates the unboxing and initial setup of the projector, highlighting the included components and their functions, particularly the Bluetooth remote.
3. Producte acabatview
The EZCast J4 is designed for portability and ease of use. It features a compact form factor with essential ports for connectivity and intuitive controls.
3.1. Característiques físiques
- Dimensions: 4.53 x 4.57 x 1.38 polzades
- Pes: 13.5 unces
- Controls: On-device buttons for basic navigation and a focus wheel.
3.2. Ports i connexions
- CC 15V: Entrada d'alimentació per a la càrrega i el funcionament.
- USB A: For connecting USB devices, such as a keyboard or mouse, or for media playback.
- HDMI: For wired video input from laptops, gaming consoles, etc.
- Jack d'àudio: Per connectar altaveus externs o auriculars.
- Ranura per a targetes Micro SD: For direct media playback from a memory card.

Image: The EZCast J4 projector held in a hand, illustrating its palm-sized and lightweight design for easy portability.
4. Configuració
4.1. Càrrega inicial
Before first use, fully charge the projector using the provided power adapter. The LED indicator will show charging status.
4.2. Encendre/apagar
Press and hold the power button on the projector or remote control to turn the device on or off.
4.3. Ajust del focus
Use the focus wheel located on the side of the projector to sharpen the projected image. Adjust until the image is clear.
4.4. Correcció Keystone
The EZCast J4 features automatic vertical keystone correction for quick image adjustments. For manual 2D keystone correction, navigate to the settings menu.

Image: A diagram illustrating how the projector can adjust its image from various angles using auto vertical and manual 2D keystone correction.
4.5. Emparellament del control remot
To pair the Bluetooth remote control with your EZCast J4 projector:
- Navigate to the 'Settings' menu on the projector screen.
- Select 'Bluetooth' from the side menu.
- Turn on Bluetooth and select 'Search' for accessories.
- On the remote, press and hold the 'Return' and 'OK' buttons simultaneously until the red LED light on the remote blinks from fast to slow.
- Once 'BLE Remote' appears on the projector screen, select it to complete pairing.
Video: This video demonstrates the process of pairing the Bluetooth remote control with the EZCast J4 projector, showing the steps on screen and the remote's indicator lights.
5. Instruccions de funcionament
5.1. Reflex de pantalla (sense fil)
The EZCast J4 supports 2.4G/5G WiFi for real-time screen mirroring with low latency. It is compatible with iOS & Android smartphones/tablets, MacBook & Windows laptops. Ensure your device and projector are connected to the same WiFi network.

Image: A smartphone wirelessly mirroring its screen to the EZCast J4 projector, displaying a game with low latency.
5.2. Connexions amb cable
Connect devices via the HDMI or USB ports. The projector supports various devices including TV sticks (e.g., Fire TV stick) and gaming consoles (e.g., PS5, Xbox, Switch).
5.3. Portrait Mode
The built-in G-sensor can detect rotation and automatically switch between horizontal and vertical (portrait) projection, adapting to your content and setup.

Image: A collage showing the EZCast J4 projector being used in different settings such as for sport games, bedtime viewing, in a campervan, gaming, patio parties, and camping.
Video: This video showcases the projector's capabilities in various operational modes, including screen mirroring and wired connections, demonstrating its versatility for different content types.
6. Connectivitat
The EZCast J4 offers comprehensive connectivity options:
- Sense fil: 2.4G/5G WiFi for screen mirroring (Airplay, Miracast, DLNA protocols).
- Amb cable: HDMI, USB, and Audio Jack ports.
- Bluetooth: Integrated Bluetooth for connecting to external speakers.
7. Battery and Power
The projector features a built-in rechargeable battery providing up to 5 hours of playtime on a single charge, making it suitable for extended use without a power outlet. The LED lamp has a life of over 20,000 hours.

Image: The EZCast J4 projector in an outdoor setting, highlighting its 5-hour battery life for portable entertainment.
8. Actualització del firmware
To ensure optimal performance and access to the latest features, it is recommended to keep your projector's firmware up to date via Over-The-Air (OTA) upgrades. Performing a factory reset before initial use or after an update can resolve potential issues.
8.1. Resetting the Projector
- Navigate to the "Home" menu.
- Select "Settings".
- Choose "Reset All" and confirm by pressing "OK" to initiate the reset process.
- The projector will restart after the reset.
Note: Keep the power adapter connected until the final step of the reset process.

Image: Visual guide showing the steps to navigate the menu for firmware updates and resetting the projector.
9. Solució De Problemes
- Projector only turns on when charging cable is connected: Update the firmware to the latest version and perform a factory reset. Ensure the power adapter remains connected throughout the process.
- El comandament a distància no funciona: Hold both the Volume+ and Volume- buttons simultaneously on the remote while close to the projector. Once the red LED flashes quickly, the remote has paired successfully.
- Sense imatge o imatge distorsionada: Check focus and keystone settings. Ensure the input source is correctly selected and the cable connections are secure.
- Sense so: Verify the volume settings on both the projector and the connected source device. If using external speakers, ensure they are properly connected and powered on.
10. Especificacions
| Característica | Especificació |
|---|---|
| Marca | EZCast |
| Número de model | 22b57ea1-acca-4479-8db1-2c2682c93af7 |
| Pes de l'article | 13.5 unces |
| Dimensions del producte | 4.53 x 4.57 x 1.38 polzades |
| Bateries | Necessites 1 piles de ions de liti (incloses) |
| Característiques especials | Portable, Built-in Battery, Speaker, Wi-Fi Ready |
| Tecnologia de connectivitat | Sense fil |
| Resolució de visualització | 1920 x 1080 (1080P support) |
| LED Lamp La vida | Més de 20,000 hores |
| Temps de joc de la bateria | 5 hours (Eco mode) |
11. Garantia i Suport
The EZCast J4 Portable Projector comes with a 1-year warranty. For warranty registration and further assistance, please refer to the QR code provided in your user manual or contact our support team. Our support team is available to help with any questions or issues you may encounter.





