Features Convenient 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. Exquisite Aluminum Alloy Shell: The bidirectional audio switcher has excellent aluminum alloy shell, mini size and exquisite appearance, black shell makes it more stylish and powerful. No Noise: The 4-way stereo bi-directional audio switcher has high frequency electrolytic capacitor with noise reduction circuit design, no background noise, effective audio gain, improve sound quality. RCA Interface: Input and output are RCA3.5mm interface, the internal use of positive and negative power conversion circuit, a dual op amp gain boost. Easy to Use: The 4 in 2 out RCA splitter selector is easily switch between different audio inputs or outputs with dedicated audio rotary switches or lossless devices. Specification: 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. Package List: 1 x Bidirectional Audio Switcher Package List 1 x Bidirectional Audio Switcher