Huidu HD-A4L Sending Box – 650,000 Pixels | Mid-Size LED Screen Controller with LAN & Cloud Content Publishing for LED Display Screens

Package Included

Version	Package Included
HD-A4L	1× HD-A4L Controller, 1× Power Cable, 1× User Manual

About this item

• High-performance LED screen controller supporting HDMI input and Ethernet output
• Compatible with multiple LED module pixel pitches, up to 655,360 pixels loading capacity (max width 16,384 px)
• Brand features such as asynchronous & synchronous playback, multi-terminal control, and cloud-based content publishing for enhanced flexibility
• Compact design with passive cooling to ensure long-term reliability
• Ideal for indoor/outdoor fixed installations, rental displays, and creative LED setups

Order & Logistics

• Lead Time: Typically ships within 2–5 business days
• Packing: Cardboard box
• Shipping: Orders in this series qualify for our Free Shipping Policy on purchases over $399. All products in this series are shipped directly from our headquarters warehouse（Standard Shipping: 9–18 days|Express Shipping: 5–9 days.）

Key Specifications

• Input Ports: 1× HDMI
• Output Ports: 1000 Mbps Ethernet
• Supported Resolutions: Up to 655,360 pixels (max width 16,384 px)
• Control Method: USB, Wi-Fi 5 GHz + 2.4 GHz, Cloud control
• Power Supply: DC input (via included adapter)
• Operating Temperature: –20 °C to +60 °C

Usage Notes / Installation Tips

• Always power off before connecting or disconnecting signal cables
• Use shielded network cables for stable data transmission
• Ensure adequate ventilation for prolonged operation
• Avoid placing the controller in high-humidity or dusty environments

Technical Specifications

Picture
Model	A6L	A5L	A4L	A3L
Loading Capacity	2.62M pixels	1.3M pixels	655,360 pixels	655,360 pixels
Max Width	65,536 px	16,384 px	16,384 px	8192 px
Memory	64 GB	16 GB	16 GB	16 GB
External Expansion	Max 128 GB	Max 128 GB	Max 128 GB	Max 128 GB
Video Hard Decoding	4K	4K	4K	4K
Video Signal Input	1× HDMI	1× HDMI	1× HDMI	–
HDMI Cascade	√	–	–	–
Streaming Media	√	√	√	√
LAN	1000 Mbps	1000 Mbps	1000 Mbps	100 Mbps
Wi-Fi Control	5 GHz + 2.4 GHz	5 GHz + 2.4 GHz	5 GHz + 2.4 GHz	2.4 GHz
Screen Casting	Optional	–	–	–
USB Playback	√	√	√	√
Cloud Management	√	√	√	√
4G/5G Module	Optional 4G/5G	Optional 4G/5G	Optional 4G/5G	Optional 4G
External Sensor	2 channels	2 channels	2 channels	1 channel

Applications

• Fixed LED billboards
• Rental stage LED screens
• Indoor/outdoor advertising displays
• Conference / exhibition LED displays
• Smart commercial display