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Bluetooth Audio Receiver Board Bluetooth 4.1 Mp3 Lossless Decoder Board Wireless Stereo Music Module 3.7-5v - Integrated Circuits - AliExpress
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Bluetooth 4.1 Receiver and Transmitter, 2-in-1 Wireless 3.5mm Audio Adapter,Built-in Mic for Hands-Free Calling in RX Mode - Walmart.com
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Upgraded] Roav Bluetooth Receiver, by Anker, with Bluetooth 4.1, CSR Bluetooth Chip, Noise-Cancellation, Integrated Mic for Hands-Free Calling, AUX-Out, and a USB Charging Port Car Electronics Accessories - Newegg.com
Bluetooth 4.1 will bring more reliable, automatic connections, multiple roles, & more via software update - 9to5Mac
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Amazon.com: Besign BK01 Bluetooth 4.1 Car Kit Handsfree Wireless Talking & Music Streaming Receiver with Dual Port USB Car Charger and Ground Loop Noise Isolator for Car with 3.5mm AUX Input Port :
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