You can make DIY program by mobile phone via Bluetooth anywhere anytime. Fashion and eye-catching, best choice for your trade show, party, conference and concert. Party, exhibition, restaurant, waiter, guide, model car, model bus, driver, promotion, salesman, as a LED sign, you can use it anywhere. Show different message at different time and situation Support Chinese, English, Korean, Japanese, Russian, Spanish and so on. Type: Black Frame Red Font Four Characters Color: Black Material: ABS Size: 90 x 30 x 6mm Package Contents: 4 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 a little different from the real thing. The measurement allowed error is +/- 1-3 cm.