Specifications: New laser bicycle safety laser light for camping, cycling, sporting, etc. High brightness laser light to warn on the road. Two dual light lines on the road send by the laser indicator to keep a safe distance. It has 3 flashing modes: slow strobe/fast strobe/normal. Type: Bicycle Tail Lights Working Time: 9 - 36 Hours Battery by: 2 x AAA Batteries (Not Included) Features: Wide Visibility, Easy to Install, Safety Lights Size: 8cm x 7cm x 3cm/3.15" x 2.75" x 1.18" (Approx.) Suitable Bicycle Tube Diameter: no More than 3.2cm/1.26" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Bicycle Tail Light (5 LED + 2 Laser Rear Light) 1 x Rear Light Mount Holder