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Amazon.com: Personal Sound Amplifier - Personal Audio Amplifier Device and Voice Enhancer Device for Sound Gain of 50dB, Up to 100 Feet Away, Pocket Hearing Devices : Health & Household
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Amazon.com: Personal Sound Amplifier - Personal Audio Amplifier Device and Voice Enhancer Device for Sound Gain of 50dB, Up to 100 Feet Away, Pocket Hearing Devices : Health & Household
Amazon.com: ZOWEETEK ZW-Z258 Portable Rechargeable Mini Voice Amplifier with Wired Microphone Headset and Waistband,Supports MP3 Format Audio for Teachers,Singing,Coaches,Training,Presentation,Tour Guide : Musical Instruments
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