Color: Blue LED - Large 12 x 36 dots screen display; Pitch: 1.85mm; Can display 1500 English characters 650 Chinese characters 2 pictures 11 animated icons; 5 different speeds and 4 brightness (25% 50% 75% 100%) adjustable; Communication via PC (USB cable included); Closed back design; Magnetic adsorption; Display language: English / Simplified Chinese / Traditional Chinese / Korean / Japanese / Russian and the language of all European countries; Perfect as name badge or slogan display for tradeshows exhibitions conventions promotions and advertisings; Powered by rechargeable 240mAh battery; Working time: 8~12 hours (25% brightness); Charging time: 2~3 hours; Work Voltage Range: DC 5V