40x60cm Ultra-thin LED writing board Product name: LED Writing Board Our normal sizes are 2030, 2535, 3040,4060, 5070,6080,3080,60100cm Free accessories: power adapter, remote control, controller, cleaning cloth and a white color marker for each board. Parameter: Power supply: Input: AC 110V-220V; Output: DC12V/1A Writing board voltage: DC 12V/1A * Temperature and humidity: Temperature: -40~60, humidity: