We only have one remote control, so we only opened one battery at first. It worked for about the first month and then stopped working. I contacted the seller and he first responded and asked more questions, but after answering and answering his questions I haven't heard from him. In general the product is good I think but the battery didn't last long. And I'm not sure how long the second one will last. I would not recommend this product just because the seller could not solve my problem.
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