INFI Audio Tube Amplifier HiFi Stereo Receiver Integrated Amp with Bluetooth Hybrid Amp for Home 2.0Ch Theater System, Adjustment Audio Headphone Amplifier. TUBE HYBRID AMPLIFIER: Front Panel Main Volume/Bass/Treble adjustment knob. Supplied with a replaceable tube. EXQUISITE MATERIALS: Headphone Power Amplifier adopting aluminum alloy oxidation drawing process has stronger protection. Metal cutting knob for more delicate control.TUBE PROTECTION COVER: The use of whole Aluminum block mesh for the tube protection not only adding protection to the Tubes, but also provides Decoration and Kids Protection for the hot tubes. STEREO INPUT: Super powerful extension, multiple audio sources. Smart connection allows you to enjoy the of music in many ways. If you encounter any problems, please contact our customer service team immediately. This item is in the category "Consumer Electronics\TV, Video & Home Audio\Home Audio\Receivers & Amplifiers\Amplifiers & Preamps". The seller is "best-buy-2018" and is located in this country: US. This item can be shipped worldwide.