Phone connector (audio) - Wikipedia
Amazon.com: 3.5mm Stereo to Dual Mono Cable, 6inch 1/8" TRS Male to 2 TS Mono Female Adapter Gold-Plated Connector Audio Y Splitter Cord for Headphone, Speaker : Electronics
3.5mm to Double 6.5mm TRS Cable AUX Male Mono 6.5 Jack to Stereo 3.5 J
Amazon.com: iSbeller USB Bluetooth Transmitter Receiver 2 in 1, Bluetooth Adapter for TV PC Headphones Home Stereo Car, Wireless Audio Adapter with 3.5mm AUX : Electronics
Clearance under 5---CableCreation 2 Pack 3.5mm 1/8 Stereo Jack to 3.5mm Audio Male to Male Adapter Connectors Gold Plated - Walmart.com
Stereo-to-Mono Audio Cable for Single-Ear Monitoring for MX PRO and M6 PRO In-Ear Monitors (Black) - MEE audio
Monoprice 3.5mm TRS Stereo Plug to 3.5mm TS Mono Jack Adapter, Gold Plated - Monoprice.com
Plugable USB Audio Adapter – Plugable Technologies
Monoprice 2.5mm TRS Stereo Plug to 3.5mm TRS Stereo Jack Adapter, Gold Plated - Walmart.com
Simple Way to Convert Stereo to Mono : 5 Steps (with Pictures) - Instructables
Rca Bluetooth Transmitter Receiver | Rca Video Transmitter Bluetooth - 1m Aux 3.5mm - Aliexpress
Alto Bluetooth Ultimate Stereo Bluetooth Adapter | Sweetwater
3.5mm to Double 6.5mm TRS Cable AUX Male Mono 6.5 Jack to Stereo 3.5 J
3.5mm 3-to-2-Conductor Plug, Gold-Plated Mono-to-Stereo Adapter
Amazon.com: Disino 1/4 Mono to 3.5mm Stereo Adapter, Gold Plated 6.35mm TS Male Plug to 1/8 inch TRS Female Audio Connector - 2 Pack : Electronics
JL Audio 12V RCA Bluetooth Receiver: MBT-RX
Amazon.com: 1ft CablesOnline 3.5mm Stereo Male to Dual (Rd/Wh) Mono 3.5mm Blue Audio Breakout Cable, AM-601C : Electronics
Learn more about audio adapters on the Teufel Audio blog
Alto Professional Bluetooth Ultimate Battery-Powered BTULTIMATE
3.5mm Wireless USB Bluetooth Stereo Mono Music Speaker Receiver Adapter Dongle | eBay
Amazon.com: UGREEN 1/8 to 1/4 Stereo Cable 3.5mm TRS to Dual 6.35mm 1/4 TS Mono Y Splitter Audio Cord Adapter Compatible with iPhone, PC, Computer Sound Card, Mixer, Multimedia Speaker, Home Stereo
Amazon.com: ZIOCOM Bluetooth Receiver, High-Fidelity Wireless Audio Adapter with 3.5mm AUX RCA Cable, Bluetooth 5.0 Receiver for Home Stereo System, Car Speaker, Wired Speaker : Electronics
Baseus Aux Bluetooth Adapter For Car 3.5mm Jack Usb Bluetooth 5.0 Receiver Speaker Auto Handfree Car Kit Audio Music Transmitter - Bluetooth Car Kit - AliExpress
