Huidu HD-A4L LED display controller and media player
The Huidu HD-A4L combines synchronous input and asynchronous media playback for LED displays. Use HDMI input for a live source, or publish videos, pictures, GIF animations, text and WPS documents for scheduled display content. Two Gigabit output ports connect to HD-R series receiving cards.
Control and content playback
Built-in 2.4GHz Wi-Fi supports wireless control with the LedArt mobile app and STA mode for connection to a nearby Wi-Fi network. Wireless projection is supported from phones, tablets and computers. XiaoHui Cloud supports remote management; 4G/5G access is optional.
The HDMI input supports automatic scaling and synchronous/asynchronous picture-in-picture. USB interfaces support program loading and storage expansion. Two sensor inputs allow connection of environmental monitoring sensors.
HD-A4L specifications
| Parameter | Specification |
|---|---|
| Maximum loading capacity | 655,360 pixels |
| Maximum horizontal width | 16,384 pixels (subject to loading limits) |
| Maximum vertical height | 4,096 pixels (subject to loading limits) |
| LED output | 2 Gigabit Ethernet ports; HD-R series receiving cards |
| Communication network port | 1 Gigabit Ethernet port |
| Video input | 1 HDMI IN |
| USB interfaces | 1 USB 2.0 (custom OTG/USB mode); 1 USB 3.0 |
| Sensor inputs | 2 channels |
| Audio output | 1 TRS 3.5 mm, two-channel output |
| Wi-Fi | 2.4GHz; STA mode supported |
| Multi-window playback | Up to 2 × 4K, 6 × 1080P, 10 × 720P or 20 × 360P |
| Playback modes | Synchronous and asynchronous |
| Mobile network | 4G/5G optional |
The maximum width and height are separate limits, not a supported 16,384 × 4,096 screen size. Keep the total display within the stated pixel capacity.
Product images


Frequently asked questions
Which app is used to control the Huidu A4L?
The HD-A4L supports the LedArt mobile app for wireless control over Wi-Fi. It also supports XiaoHui Cloud for Internet-based remote management.
How many pixels can the HD-A4L control?
Its maximum loading capacity is 655,360 pixels. The separate width and height limits must still be used within that overall capacity.
Can the A4L play an HDMI source and stored content?
Yes. It supports synchronous and asynchronous playback, switching between these modes, and synchronous/asynchronous picture-in-picture.
Is 4G or 5G included as standard?
No. The specification lists 4G/5G access as optional. Standard wireless connectivity is 2.4GHz Wi-Fi. Check the supplied configuration before ordering.
Where can I check the A4L price and specification?
The current price is displayed in the purchase section of this page. The HD-A4L specification PDF is available below for interface and configuration details.







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