Perfect for Your Home Perfect for Livingroom Connectable with CD player, DVD player, PC, Smartphone, TV by using RCA & AUX ,Bluetooth, U disk, Optical and Coaxial. Those connection allows you to enjoy the “Tube”Sound. Multifunctional Use STEREO Input&Output: Super powerful extension, multiple audio sources. Bluetooth Tube Amplifier Stereo Receiver for Your Need The high powered home theater pro audio receiver features a built-in cooling fan to prevent overheating. Additional feature includes a double-sided fiber circuit board. Home Theater Audio Desktop Stereo Vacuum Tube The modern classic exterior design makes your home look more cool and luxurious. USB & LOSSLESS PLAYBACK Support WMA, WAC, MP3, FLAC, APE and other lossless audio formats. Front Panel has independent Treble/ Bass/ Volume adjustment Knob. PROTECTION COVER The use of thickened steel wire meshed for the tube protection cover not only adds protection of the tubes, but also provides cooling performance and user safety. SUPPORT FIBER COAXIAL Calmly deal with major scenes. Play directly with U disk, making it easier and faster for you to enjoy wonderful music. Support the interconnection of devices with coaxial and optical digital interfaces, such as smart TVs and DVD players. Specifications Pre Amp Tube Model 6H3N or 6N3 Output Impedance 4-8ohm Bluetooth Range <10 meter/<33 foot range(Open Area) AC Power Input 110V 50Hz USB Support WAV/MP3/WMA/APE/Flac Power Amplifier IC 1941/5198 RCA Input TV/Laptop/MP3 player/Smart Phone Earphone Jack