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Product Description: Introducing the Loud Speaking Phone, a high volume phone designed for noisy environments. This noiseless telephone device feature...

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Product characteristics: 1. On-board power amplifier module, high output power up to 25W, sound loud. Conversion efficiency is higher, fever is smalle...

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...t the impedance (measured in ohms) of the speakers matches the 's output impedance. This helps optimize power transfer and prevent damage ...

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