The TALOS 18" x 24" Safety Sign Kit informs guests of dangerous lightning in the surrounding area with easy to read details. When the attached device starts flashing from one color to the next, guests can be made aware in real time that lightning is close enough to strike their location. Perfect for public areas such as restaurants with outdoor seating, in community parks and playgrounds, areas suited for large event gatherings, outdoor tiki huts, and more. This battery-operated detector operates on 4 AA batteries for a quick and easy setup.• 3 different colors indicate the distance (approaching or departing) of the storm front: Green = 25 milesBlue = 16 milesRed = 6 miles• Loudest audible alerts: 1 Beep for Green = 25 miles2 Beeps for Blue = 16 miles3 Beeps for Red = 6 miles• Instant alerts every time lightning is detected• Detects lightning up to 25 miles• Waterproof design• Same technology as used in expensive weather stations• Safety sign is made of durable PVC material that stands up to UV fading• Provides visual description of color LEDs• Operates on 4 AA batteries Perfect for public areas, parks, playgrounds, & more Three bright colors & loud audible alerts indicate distance of storm front Detects lightning up to 25 miles away | Talos 18" x 24" Safety Sign and Lightning Detector Kit, Battery-Operated in Red