... Scrolling Message,Indoor LED Display,Outdoor LED Display, LED Name Card, LED Badge, LED Message Badge, LED Name Tag, LED ... LED Display Manufacturer, LED Sign Manufacturer, Countdown Clock ManufacturerLED display card operation instructions: 1) Presses "K1" to turn on the LED ... altogether, among which the 1st group can store 512 characters, 5 other groups can store 256 characters), after you choose the ...