Features • Extraordinary Sound Quality: Experience crystal-clear o with advanced noise reduction circuitry, ensuring no background noise for an immersive listening experience • Sturdy Aluminum Alloy Shell: Built to last, the robust aluminum housing provides excellent signal integrity while effectively minimizing interference • Portable and Compact Design: Take your sound quality enhancement on the go with this lightweight and compact amplifier, for use anytime, anywhere • Wide Compatibility Options: Connect effortlly to a variety of devices, including DVD players, game consoles, and headphones, for versatile o enhancement • Convenient Volume Control: Easily adjust your listening experience with a user-friendly volume knob, allowing for sound level customization Features: 1、[Extraordinary Sound Quality] The amplifier is equipped with high frequency electrolytic capacitors, has a noise reduction circuit design, and has no background noise, which can effectively gain o and improve sound quality. 2、[Aluminum Alloy Shell] The aluminum alloy housing of the amplifier is very sturdy, has good anti interference and no loss of signal. 3、[Portable and Compact] The amplifier is small in size, easy to carry and use, and can enhance the sound quality of your device anytime, anywhere. 4、[Wide Compatibility] The amplifier is widely compatible with all o equipment, and the input can be connected to DVD, CD, set top box, MP3, TV, game console or other equipment. The output can be connected to speakers, subwoofers, headphones, etc. 5、[Adjustable Volume] The amplifier has a volume adjustment knob, which can ly adjust the volume according to the user's needs. Specification: Item Type: Mini Stereo o Preamplifier Material: ABS and aluminum alloy Input: RCA (L/R) , 3.5mm Output: RCA (L/R) , 3.5mm , phone Power Supply: DC 5V Battery: 1000 mah 503450 lithium battery (built in) Compatible Input Devices: DVD, CD, set top box, MP3, TV, cell phone, computer, tablet, turntable, sound card, guitar, bass, electronic musical instrument, game console or other device. Compatible Output Devices: Speakers, Subwoofers, Sound Blasters, Reverbs, AV Receivers, Post Amplifiers, Headphones, etc. Size: Approx. 87 x 50 x 37mm / 3.42 x 1.96 x 1.45in Package List: 1 x Mini Stereo o Preamplifier 1 x USB Power Cable Package List 1 x Mini Stereo Audio Preamplifier 1 x USB Power Cable