... : A to Z, 0 to 9, +, -, x, /, =, *, !, $, &, @, #, ?, ., ', :," " and ( ) Each message: maximum 16 characters (including spaces) Different LED light colors are available ... fan handle Good for promotional purposesSample :Sample is available and need 4 ~ 5 daysLogo :Customized logo is available cooling portable LED ...