SODIAL(R) Mini USB Bluetooth V4.0 Dual Mode Wireless Adapter Dongle Backward compatible with Bluetooth v1.2/2.0/2.1/3.0 Bluetooth low energy Radio USB Dongle. Dual-mode Bluetooth transfer. Low-power selectable 1.2 to 3.6 VI/O. Supporting Bluetooth voice data. Backward compatible with Bluetooth v1.2/2.0/2.1/3.0.