SafeWays LED Mesh Power Vest, Neon Yellow Proactive lighting system with patented LED lens with 2 super white LEDs and 4 red LEDs for proactive visibility up to 1000 meters in total darkness Included: two lithium cell batteries (Panasonic CR2032 3V) for use up to 150 hours 3-way switch: blinking - stable - off Conforms to European Standard 471 Class 1 Universal size - for use in sportswear