1. 36 super bright red LEDs hidden inside water-proof clear cup 2. Double function: lighted warning and reflecting with arrows in reflector 3. Flashed or glowed LED light can be seen to 2,500 meters away 4. Self-illuminated reflective light can be seen to 200 meters away 5. 2 versions: white arrow on red blanket or red arrow on white blanket 6. Water resistance design with carrying bag 7. Strong magnet and grommet on 4 sides to hang on any place and prevent wind 8. Standard size: 99cm long and 48cm high 9. Customized length and width and LED number optional 10. Uses 4 x AA batteries and car plug optional