2 PORT 3.5mm STEREO Manual Switch Box AUX Audio source signal Speaker selector 1/8 headphone switcher mini 2 (1) in 1 (2) out|Amplifier| - AliExpress
Carevas LINEPAUDIO Audio Switcher 3.5mm 2 in 1 Out / 1 in 2 Out A/B Switch Stereo Audio Splitter Box with No Distortion 3.5mm Jack for Switching Between Computer Speakers and Headphones - Walmart.com
Mini 3.5mm Stereo A/B Switcher Box Headphone Jack Splitter Amp Speaker Selector | eBay
Amazon.com: NETmate 2 PORT 3.5mm STEREO Manual Switch Box AUX Audio Speaker selector(Wall Mount Hole Built-in, wall or table available) : Electronics