I have one and it says FLO all the time. I returned it and got another one, it seemed to work for a while then the fan inside started running loudly every time I used it. I didn't really use it that much, and then one day I connected it to the battery as usual and the thought was for naught. I work with electronics and I could tell there was a smell of a burnt capacitor or something inside. I throw away this headache and would not recommend this product to anyone!
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