☆Product Details: Quoted from the online shop☆ Connector Type: 3.5mm Jack Brand: LiNKFOR Cable Type: AUX Number of Ports: 4 Product Dimensions: 5.6D x 7.8W x 2.4H cm "3.5mm Stereo Audio Switcher": Adopts a standard 3.5mm interface. It is a 4-IN-1-OUT / 1-IN-4-OUT audio selector with multiple audio source and output functions. "4-Port Bi-directional Switching": 4 inputs 1 output: Connect four audio sources to (IN / OUT) A / B / C / D, and use the switching knob to select the audio input and get the output. 1 input 4 outputs: Connect the audio source to IN / OUT, and select the audio output between (IN / OUT) A / B / C / D. (Note: Only supports one output/input selection, and cannot support 4 outputs/inputs simultaneously) "No Power Required": Plug and play, no external power supply is required. There is no effect on sound quality. "Wide Compatibility": Compatible with all devices with a 3.5mm audio output port, such as mobile phones, laptops, computers, MP3, MP4, earphones, and active speakers. Weight: 0.2KG LiNKFOR 4-Port Audio Switcher 4 Input 1 Output / 1 Input 4 Output 3.5mm Headphone Switch Speaker Selector Switcher Splitter No Power Required Volume Adjustable with 3.5mm Audio Cable Compatible with MP3 MP4 ・-・-・-・-・-・-・-・-・-・-・-・-・- Thank you for viewing! ◎ Immediate purchase OK ◎ Home storage, shipped in simple packaging, so Please understand and purchase!