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【Powerful Sound Effect】Whistle Horn Speaker, Remote Broadcast High-pitched Loud Speaker, Outdoor Waterproof Design, Amplification Clear Up to 500 meters! 【Core Selling Points】High-efficiency drive, waterproof and dustproof, suitable for various harsh environments. 【User Pain Points】Solve the problem of insufficient sound propagation in outdoor activities and emergency broadcasting. 【Brand Certification】CE and ROHS certified, quality assurance. 【Emotional Resonance】Whether it's campus broadcasting or outdoor rescue, clearly convey every call, let the communication be unlimited.