SEGURO Rechargeable Mini Red LED Programmable Badge Display with USB Programming Cable (12x38 pixels) Working hours: 20 hours (when the brightness at 25%); at least 10 hours (when the brightness at 100%) Can store 680 English characters or the same amount of image information (which can be shown within your company badge LOGO) Display Message Selection: Either select to display any one single text message or eight text message/image in sequential, order by clicking button on the backside Display the remaining battery power, you can no longer worry about how long Input Method: PC Programming via USB - Windows Compatible: Win 8,XP, Vista, 7