Amphipod Vizlet LED 2 Pack 3" high 3" wide Ultra-bright Wearable flashing LED reflector. Super versatile! Wear on shorts/waistband, hydration belt, pack/bag strap, shirt sleeve/collar, vest, caps/hats and more. Brilliant LEDs! Add high brilliance reflectivity to just about anything! Ultrabright flashing LED Simple press button on-and-off Drugstore battery for easy replacement