Color: Blue LED - Large 7 x 29 dots screen displays - Pitch: 1.85mm - Set your own message through 7 buttons on the back of badge can display 20 user-customizable messages - Communication via PC (USB cable excluded) - Closed back design - Magnetic adsorption - Display language: English and the language of all European countries - Perfect as name badge or slogan display for tradeshows exhibitions conventions promotions and advertisings - Powered by CR2032 battery (included. Comes with an extra battery) - Work Voltage Range: DC1.5~5V - English user manual included