Sealed and waterproof High quality ABS material+waterproof shell, sturdy and durable, with good waterproof performance, ensuring long-term use.
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Copper plug Copper plug: better conductivity. ----------PK---------- Iron plug: rusting leads to poor power supply.
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High-decibel The design of the generous mouth, the sound spreads farther, the pronunciation is loud and pleasant, and the sound pressure level can reach 130 decibels.
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