We have been making indoor and outdoor LED signs for more than 15 Years! fx4 p3.91 indoor hd led video wall panel new 2018 fx video wall tile. Thanks for Watching & feel free to ask us any questions! Smart LED Inc's FX3 Series LED Panels are 19.7H x 19.7W, for Indoor Use Only and come with 1 power connector and 1 Data Connector for interlocking more than 1 panel to build an LED Video Wall of ANY SIZE!