DASHUHUWAI Diamond-shaped Rechargeable LED Bike Tail Light, Bicycle Tail Light, Rear Bike Light with Two-line Laser Beams Used As Bike Safety Light or Bicycle Brake Light for Cycling 8 pieces of SMD LED light source controlled by smart LED button switch with 3 mode: slow flash, quick flash, normally on. 2 beams of visible red laser controlled by smart LD button switch with 3 modes: slow flash, quick flash, normally on. Battery Powered by built-in rechargeable 3.7V 14500 lithium ion battery with 1,200mA. 6 hours continuous run time after being charged fully and suitable for long bike cycling travel. Loved by bike cycling enthusiasts at night as safety indicator, making night riding or cycling safer!