Works mostly when you're close enough to the stereo to turn your finger on/off or change the volume/channel. It hit or missed from five feet. Next and useless. Bought to control a boat radio but it's a waste of time and money. When the sunroof is closed (e.g. when the air conditioning in the cabin is on). As a "bonus" it doesn't come with a battery, so I ordered ten packs of batteries that I no longer need.
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