939 AT293 R A 8" Safety & Emergency Beacon Alternating Red Amber wavecel accessory Fast Rehydration: electrolytes prevent and Black Work Wear Fast Rehydration: electrolytes prevent and combat dehydration quickly in hot environments Rapid Muscle Recovery: critical branched chain amino acids help to promote energy production and minimize inflammation and muscle fatigue On the Go Packaging: adding one flavored solo shot to 16 oz of water for ease of hydration Proprietary electrolyte formula including Sodium Excellent resistance to extreme temperatures 70°C 94°F to +200°C +392°F Multi layered construction for maximum thermal protection Liquid proof outer layer to protect from splashes Quick release buckles at neck and waist for added safety Superior flexibility that will not stiffen at extreme temperatures Easy to clean and will not stain FOUR "AA" BATTERIES BATTERI DUAL FLASHING 2 COLOR