Item Type: Bidirectional Audio Switcher Working Voltage: DC 5-19V Input: RCA (L/R) + 3.5mm Output: RCA (L/R) + 3.5mm 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. 1CONVENIENT WITHOUT SWITCHING: When you have multiple audio devices that need to share the audio amplifier or power supply, you can connect multiple devices at the same time to use their output, which is convenient and practical without switching 2EXQUISITE ALUMINUM ALLOY SHELL: With excellent aluminum alloy shell, mini size and exquisite appearance, black shell makes it more stylish and powerful 3NO NOISE: High frequency electrolytic capacitor with noise reduction circuit design, no background noise, effective audio gain, improve sound quality 4RCA INTERFACE: Input and output are RCA3.5mm interface, the internal use of positive and negative power conversion circuit, a dual op amp gain boost 5EASY TO SWITCH: Easily switch between different audio inputs or outputs with dedicated audio rotary switches or lossless devices1 x Bidirectional Audio Switcher