Taxi light box has following specations as following: 1. Two transparent covers for exchange ad paper easily 2. Two LED strips as light source 3. Taxi (LED) can exchange color with red or green control by driver, that show taxi's situation, if have passenger, it will show red; If have no, it will show green 4. Power supply: 12V DC and 1.5A 5. Magnets strong enough to withstand highway speeds 6. Waterproof and stands sunshine 7. Size: 850 x 350 x 300mm