Feature: Two dual light lines on the road send by the laser indicator to keep a safe distance. Pretty design， 5 high light LED. + 2 laser launcher 260 ° wider visibility and 7 flashing models Water resistant and high quality Can suit for the seat post: 20 -36mm Power: Supply by 2 x AAA battery (not included). Color: Red Package content: 1set * Bike Laser Tail Light