Fangrui Product Details Features: 2-in-4-out Audio Selector, The Input Can Be Connected To 2 Amplifiers, And The Output Has 4 Interfaces, Which Can Be Connected To Speakers. The Panel Has Push-button Input And Output Switching Buttons, Manual Switching, Stable Sound Without Interference; No Need To Plug In, Easy To Use And Save Energy. There Is A Non-slip Pad At The Bottom To Protect Your Desktop; Using Audio Equipment With A Switch Can Avoid The Wear And Tear Of The Interface Caused By Plugging And Plugging, And Prolong The Service Life Of The Audio Equipment. Parameters: Audio Input: Speaker Jacksx2 Audio Output: Speaker Jacks X4 Material: Plastic+metal Colour: Black+red Package Contents: 1 X Speaker Selector Box Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different Displays May Cause The Color Of The Item In The Picture A Little Different From The Real Thing. The Measurement Allowed Error Is +/- 1-3cm.