Keyestudio HM-10 Bluetooth-4.0 V3 Module Compatible with HC-06 Pins/supports Android & iOS system
Bluetooth 4.0 USB Adapter, Lovin Product USB Bluetooth Wireless Micro Adapter Compatible with Windows 10,8.1/8,7,Vista, XP, 32/64 Bit for Desktop, Laptop, Computers – lovinproducts
IOGEAR - GBU522 - Mini USB Dual-Mode Bluetooth 4.0 Transmitter
What is Bluetooth 4.0 and its Features? - The Gadget Square
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IOGEAR - GBU521 - | Bluetooth Adapter | Bluetooth Dongle | USB Bluetooth
Serial Bluetooth 4.0 BLE Module - iBeacon
Bluno Link - A USB Bluetooth 4.0 (BLE) Dongle - DFRobot
CSR USB BT 4.0 Bluetooth Dongle CSR8510 - ElectroDragon
Mini USB Bluetooth 4.0 Dongle - 50m - Bluetooth & Telecom Adapters | StarTech.com
USB Bluetooth Adapter PC 4.0, Wireless Bluetooth Receiver - Maxesla
USB Bluetooth 4.0 Adapter - Power Music Hardware Store
The 3G4G Blog: Different flavours of Bluetooth: 4.0, 4.1, Low Energy, Smart, Smart Ready...