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Hi Myly5100, Yes, when operating the unit on the built-in battery, it is recommended that you remove the AC adaptor from the wall outlet and the DC IN jack. Disconnect the plug of the external power source before operating the unit. Thanks! ^Ron
Sorry, there was a problem. Please try again later.JohnH3 does not know what he is talking about or is talking about a different product. Item has a built-in rechargeable battery and is absolutely portable. Also plugs into AC outlet when stationary.
Sorry, there was a problem. Please try again later.it's also AC, comes with the transformer and plug. we love our, several programing features that you too will take advantage of .
Sorry, there was a problem. Please try again later.It comes with an electrical plug
Sorry, there was a problem. Please try again later.batteries and plug in to outlet
Sorry, there was a problem. Please try again later.Not portable at all. Power supply plugs into wall outlet.
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