The DD-16SL is a highly portable and cost-effective 1 to 16 channel MultiViewer with HDMI output, designed to support 3G/HD/SD formats. This compact device offers custom layouts with various standard configurations, allowing each window to operate independently with different formats and frame rates. It features 16 character UMD overlays per window with individual enables, custom positioning, and size adjustments. The DD-16SL also includes audio ID overlays, fast switching between inputs using full-screen scaling, and selectable output formats in both full-screen and MultiViewer modes. With low latency buffering for each input, it supports non-synchronous inputs and variable aspect ratios per window. The pass-through mode allows any of the 16 inputs to be routed to the HDMI output. The DD-16SL is equipped with an easy-to-use LCD and button control system, eliminating the need for complicated LED/button controls or dip switches. Additional features include a USB port for control and firmware updates, a heavy-duty metal case, and a metal thread locking DC power socket. The package includes a power supply, HDMI cable, and USB cable.