Maxsa 20026 Yellow Large Reflective Safety Vest with 16 LED Lights 16 built-in LED lights with two modes: Continuously on or flash 150 times per minute Vest features highly reflective fluorescent material and super bright LED lights to be seen from 2500 feet away Great for directing traffic, tow and truck drivers, runners, bikers or just for walking the dog at night, be safe and be seen from front and back with super bright LED lights on both sides Flexible band with hook and loop closures and lightweight mesh material Requires two AA batteries (not included)