I purchased one of these single TurboFlare 360 units about five years ago. Purchased it as a clearance item at Sears and found it to be nearly indestructible. After taking it to the next Fire Meeting we decided to run over it with the 4500 Gallon Freight Liner Cab Over Tender. It came out without any issues other than a few scratches. It is incredibly bright at night and definetly commands attention. During the day however it works fairly well but, not in bright conditions. Smoke from a flare will work better in these circumstances.
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Although not necessarily designed to be used for Landing Zone Operations, we have found them to be an invaluable asset. Both Life Flight and MAST have commented on how easy it was to find the LZ. Also, MAST says they are visible through their IR Goggles even though there are no IR Emitters. The department purchased three 8 packs to keep one on the Ambulance, One on the Rescue, and one on the primary Engine. It has been invaluable and has saved tons of money on the cost of Flares.
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Furthermore, I have never replaced the batteries in my unit. 6 AA Duracell Batteries is all it takes. I have seen other models but, this one is the thinnest and best designed on the market. Stay away from the rechargeable units. The battery life span is not as long and the cost to replace rechargeable batteries is not great. Also, these are non incideary and will not start fires nor cause an explosion with a combustible.