Cycle Aware Lazer Shark, Bicycle Lazer & LED Tail Light Claim your space with a virtual bike lane (2) Highly visible red lasers with 2 modes: constant & flashing (5) Highly visible red LED's with 3 modes: constant & flashing alternating flashing Weather & shockproof - Burn time laser: 5 hrs constant, 10 hrs flashing - Burn time LED: 100 hrs constant, 200 hrs flashing Universal attachment bracket - Visible 600 feet away - Takes (2) AAA batteries (Not included) - Tool required: 6 mm Philips screwdriver