You can do DIY program by mobile phone via Bluetooth any where any time. Fashion and eye-catching, the best choice for your Trade Show, Party, Conference and Concert. Party, exhibition, restaurant, waiter, guider, model car, model bus, driver, promotion, sales person, as a LED sign, you can use it any place. Show different message in different time and situation Support Chinese, English, Korean, Japanese, Russian, Spanish and so on. Type: Black Frame Red Font Four Characters Colour: Black Material: ABS Size:90 x 30 x 6mm Package Contents: 20 x electronic badge Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.