Please donأ¢â‚¬â„¢t bend the product over 30ط¢آ° or repeatedly bend it in case causing product damage. In addition, same as normal matrix panel, this screen also cannot work with Uno board. We recommend using microcontrollers with large RAM and high speed to control the LED such asRaspberry Pi,Mega 2560 etc. The LED matrix has two IDC connectors (DATA_IN, DATA_OUT) on the back, which enable you to cascade multiple panels and make a huge screen. Please provide external power supply for theLED matrixduring operation, otherwise the screen display will be unclear or incomplete.