HOMCOM 370-108 Instrucciones De Montaje página 2

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Use 2 x AA size batteries (not included) to make the lights and sound work.
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When batteries need replacing, make sure to replace all of them at
the same time.
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Do not mix different types of batteries (Alkaline Standard,
Carbon-Zinc and Nickel-Cadmium).
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Do not dispose of batteries in fire,theymay explode or leak.
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