2 in 1 out/1 in 2 out Source Signal Selection Switch Headphone Speaker Switch | eBay
Amazon.com: 3-Port 3.5mm Audio Switcher Speaker Selector Headphone Switch with Bluetooth5.0 Receiver and USB Flash Disk Music Player Remote Control : Electronics
Amazon.co.jp: 3.5mm Switcher, Two-way Switcher Stereo One Key Control for Speaker Headphones : Electronics
TZT BT-Z2 Computer Speaker Headphone Switch Audio Switcher Speaker Headset Switch With PC Volume Control