Bribase Bike Bicycle Laser Tail Warning Light Cycling : 2 Laser Beam 5 LED 7 Flashing Patterns Bribase Laser LED Tail Light for Bikes & Bicycles. Two laser beams with two flashing patterns. Five High Light LED lights with seven patterns. 260 degree Wide visibility, Water Proof. Comes with 2 AA batteries. Tool free installations. Size: 2.8" x 1.3" x 3.1"; Weight: 2.2 Oz.