Feature: 1. 3.5mm Stereo Switcher: Bidirectional switching splitter sharing active speakers and headphones. 2. Method 1: Connect 2 audios to (IN/OUT)1 and (IN/OUT)2, use the 1/2 switch to get an output. 3. Method 2: Connect 1 to IN/OUT, select an output between (IN/OUT)1 and (IN/OUT)2. (Output can be switched between speakers and headphones). 4. One Key Mute Button: One key mute, convenient and fast, very practical in special situations. 5. Simple Operation: Plug and play; No External Power Required; Won't affect the sound quality at all. Specification: Item Type: 3.5mm Switcher Material: Aluminum Alloy Size: Approx. 7.8x5x2cm / 3x2x0.8in Colour: Black Interface: 3 x 3.5mm headphone plug Frequency Range: 20Hz-20KHzz Parameter: Two way switching splitter sharing active speakers and headphones (cannot be output at the same time), the analog signal supports up to 2V p-p input and output One key mute, convenient and fast, very practical in special scenes Plug and play; No External Power Required; Won't affect the sound quality at all. Package List: 1 x 3.5mm Switcher1 x Cable1 x Manual