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MakerSpot CC2640 Bluetooth Low Energy BLE 5.0 USB HID Dongle (Backward compatible with BLE 4.0 / 4.1 / 4.2) - MakerSpot
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Know The Difference: Bluetooth 4.0 vs. 4.1 vs. 4.2 (Baseband, LMP, L2CAP, App Layer) – All The Differences
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Diy Audio Receiver Board Bluetooth-compatible 4.0 4.1 4.2 5.0 Mp3 Lossless Decoder Board Wireless Stereo Music Module 3.7-5v - Operational Amplifier Chips - AliExpress
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Bluetooth 5.0 vs 4.2: Here are the differences and why it matters
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BLUETOOTH LOW ENERGY (BLE) OVERVIEW - Global Tag Srl
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