Please read how I found a way to fix scratchy microphone and scratchy sound. The battery pad wires may be a few inches longer as one of them broke trying to connect. Batteries, and I had to disassemble the case to solder the connection. Before soldering the wire I tested the wire at each connection to the speaker. At the point where it broke (another black wire), the speaker sounded hoarse and creaky, with no clear voice or siren. I connected the wire to the opposite terminal (brown wire) and miraculously it sounded perfect and a lot louder. Not sure if they made a mistake at the factory but we bought two units for my two boys and they were both faulty. I disassembled the second block, did the same, soldered the black battery terminal wire to the speaker with a brown wire and voila! I hope this helps others with the same reported issue. Now my boys are happy to ride their bikes, wail sirens through the neighborhood, and drive all the neighbors crazy. Lol I have to admit it's a pain to listen too but they love it. world โ
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