Philips bring you this Bluetooth speaker which might be just the thing you need. This model uses Bluetooth to ensure a fast pairing.
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PHILIPS Audio Portable Speaker Bluetooth, TAS7807B/00, Wireless Dust & Waterproof IP67 Speaker With Built-in Microphone For Calls & Powerbank, Up To 24 Hours Playback, Black
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Portable Bluetooth Speakers Philips TAS7807B/00
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Portable Bluetooth Speakers Philips TAS7807B/00