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Amazon.com: Orenic Wireless Bluetooth 4.1 Audio Receiver Module for Lossless Car Speaker Amplifier Circuit Board, Enhance Your Audio Experience : Electronics
Amazon.com: SENA 20S-EVO-01D EVO Bluetooth 4.1 Communication Dual System for Motorcycles : Electronics
Amazon.com: Lavalier Bluetooth 4.1 Audio Receiver 3.5MM AUX Stereo Music Hands Free Car Adapter, Builtin Microphone Bluetooth Adapter with The Hi-Fi Surround Sound System : Electronics
Amazon.com: Scosche BTTWT-SP FlyTunes Universal Portable Bluetooth 4.1 Wireless Audio Transmitter for Use with AirPods, Earbuds/Headphones, TV's and More - White : Electronics
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Amazon.com: Acxico 1Pcs Bluetooth 4.1 Stereo Sound Module Audio Transmitter Stereo Module Wireless Speaker Headphones : Electronics
Amazon.com: Sena 20S-01 Motorcycle Bluetooth 4.1 Communication System with HD Audio and Advanced Noise Control (Single) : Electronics
Tosuny Fineblue F920 Bluetooth 4.1 Headset Wireless Earpiece Retractable Handsfree Earphone Sports for Smartphone(Black) : Electronics - Amazon.com
Amazon.com: HiLetgo 3W Car Bluetooth 4.1 MP3 WAV Decoding Board Speaker Amplifier Audio Receiver Module Support USB/TF/U-Disk/IR with Remote Control : Electronics
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Amazon.com: JLab JBuds Pro Bluetooth Wireless Signature Earbuds, Titanium 10mm Drivers, 10-Hour Battery Life, Music Controls, Noise Isolation, Bluetooth 4.1 Extra Gel Tips and Cush Fins, Black : Electronics
Amazon.com: Besign Bluetooth 4.1 Car Kit for Handsfree Talking and Music Streaming, Wireless Audio Receiver with Dual Port USB Car Charger and Ground Loop Noise Isolator for Car with 3.5mm AUX Input
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Amazon.com: Roav Bluetooth Receiver, by Anker, with Bluetooth 4.1, CSR Bluetooth Chip, Noise-Cancellation, Integrated Mic for Hands-Free Calling, AUX-Out Port, and a USB Charging Port : Electronics
Amazon.com: Sennheiser HD1 In-Ear Wireless Headphones, Bluetooth 4.1 with Qualcomm Apt-X and AAC, NFC one touch pairing, 10 hour battery life, 1.5 hour fast USB charging, multi-connection to 2 devices : Electronics
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Amazon.com: Bluetooth 4.1 Wireless Receiver Adapter Cable Wire with USB Line Replacement Spare Parts for QuietComfort QC15 Headphone Accessory : Electronics
Amazon.com: EC Buying 5Pcs Bluetooth Decoding Board XY-BT-Mini MP3 Bluetooth 4.1 Amplifier Module Car Speaker Power Amplifier Board Bluetooth 4.1 Circuit Board WAV+APE+FLAC+MP3 : Electronics
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Amazon.com: TP-Link NFC-Enabled Bluetooth 4.1 Receiver, Wireless Audio Adapter Streaming Music from Echo Smart Phone Tablet PC to Home Car Stereo Sound System (HA100) : Electronics
Amazon.com: Raspberry Pi Zero W - WiFi/Bluetooth 4.1, Bluetooth Low Energy, HAT Compatible 40-pin Header, CSI Camera Connector, USRT, SPI, I2C : Electronics
