The HUIDU HD-A4L LED controller is a powerful dual-mode control unit for color LED screens, ideal for advertising, digital totems and maxischemes. Supports both asynchronous mode (reproduction from internal memory or USB) and synchronous (with real-time HDMI input). The model is sold complete with power supply, HDMI cable and free WiFi/3G/4G antenna. Simpletek, Arezzo recommends it for professional installations requiring high performance, remote management and continuous reliability. ta Technical specifications Typology : Color LED controller, dual-mode (asynchronous + HDMI synchronous) Maximum supported resolution : Up to 655.360 pixels total Max horizontal: 16.384 px Max vertical: up to 8.192 px Memory and system : RAM: 2 GB Internal storage: 16 GB , expandable via USB Operating system: Android 11.0 Video play : 2x 4K, 6x 1080p, 10x 720p, 20x 360p simultaneous hardware decode PiP function (Picture-in-Picture), Zoom automatic connectivity : HDMI USB 3.0 , 1x USB 2.0 OTG 2x LAN Gigabit (output), 1x LAN Gigabit (communication) Wi-Fi 2.4 GHz integrated Module 3G/4G/5G optional for remote management Other features: Compatible with XiaoHui Cloud for remote control Network Sensors (temperature, brightness, humidity) Supports wireless projection from smartphone, tablet and PC