Oehlbach BTX-1000, Compact Bluetooth Receiver, With aptX technology, Can be directly connected to the 3.5 mm line-in, stereo RCA or AUX connection of any stereo or loudspeaker system, 24 carat gold-plated contacts, Audio-CD quality, Perfect Bluetooth audio streaming, Up to 10 m range, Battery life: Up to 10 hours, Compatibility: Bluetooth 4.0, Including stereo RCA adapter and USB to USB Micro B charging cable