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Amazon.com: Fosi Audio BT30D-S Bluetooth 5.0 Stereo Audio Receiver Amplifier 2.1 Channel Mini Hi-Fi Class D Integrated Amp 50 Watt x2+100 Watt for Home Outdoor Passive Speakers/Subwoofer Powered Subwoofer : Electronics
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Amazon.com: Panasonic Corp. - Mini Hifi Panasonic SCHC200EGK HiFi Bluetooth 20W Black : Electronics
Personal Voice Amplifier with Headset Mic 16W Mini Sound Amplification Portable Speaker Wired Loud-speaker Amp Booster Enhancer for Teachers, Tour Guides, Coaches, Meeting, Indoor/Outdoor Events, etc : Musical Instruments - Amazon.com
