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DJ gulfam electronic full bluetooth speaker material Amplifier Board 3.7 Volt Battery Rechargeable + Single Battery holder + on off switch + charging Jack : Amazon.in: Electronics
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DIY Battery Powered Bluetooth Speaker // How to Build - Woodworking : 14 Steps (with Pictures) - Instructables
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Portable Subwoofer Wireless Speaker Soundbox 10W Transparent Dual Horn Speaker With RGB LED Light Built-In 1800mAh Battery Outdoor – the best products in the Joom Geek online store
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