Features Specifications:LED Name Card,LED Name Card, LED Badge, LED Message Badge, LED Name tag LED Product,LED Display,Led Scrolling Message,Indoor LED Display,Outdoor LED Display, LED Name Card, LED Badge, LED Message Badge, LED Name Tag, LED Sign, LED Advertisement Board, LED Panels, LED Billboard, Electronic LED Screen, Countdown Clock, LED Countdown Clock, LED Countdown Timer,LED Clock, LED Countdown Digit Sign, LED Display Manufacturer, LED Sign Manufacturer, Countdown Clock Manufacturer LED display card operation instructions:  1) Presses "K1" to turn on the LED display card, it will displays "AAA" 2) Presses "K2" to choose the group (there are 6 groups altogether, among  which the 1st group can store 512 characters, 5 other groups can store  256 characters), after you choose the group, confirm according to "K1" 3) Presses "K4" to choose the character form you want to display (There are  capital letter, small letter and special character for you to choose, please  see the blank as below) 4) After choosing the character form, you can press the "K2" or "K3" to choose  the letter or the special character you want to display. Confirms according to  "K1" after selecting a letter or the symbol each time. After you press the  "K1", you find that the letter you choose is wrong, then you can press "K5"  to correct it. That is, first press "K5", then press "K4" to choose the  character form you want to display. After that press the "K2" or "K3" to  choose the letter or the special character you want to display. Confirms  according to "K1" after selecting a letter or the symbol. After the correction  you can continue to input what you want 5) Waiting for 10 seconds, it will show automatically after all choosing the  display information wanted 6) The speed shown amounts to 9 grades, you can change its speed under  the state that it is showing according to "K4". One of the grade can make  the displaying stop don't move 7) You can press "K1" to take off it under the state of displaying 8) Operated by 2pcs CR2032 batteries LED Product,LED Display,Led Scrolling Message,Indoor LED Display,Outdoor LED Display, LED Name Card, LED Badge, LED Message Badge, LED Name Tag, LED Sign, LED Advertisement Board, LED Panels, LED Billboard, Electronic LED Screen, Countdown Clock, LED Countdown Clock, LED Countdown Timer,LED Clock, LED Countdown Digit Sign, LED Display Manufacturer, LED Sign Manufacturer, Countdown Clock Manufacturer