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Amazon.com: JBL Tune 510BT: Wireless On-Ear Headphones with Purebass Sound - Black : Clothing, Shoes & Jewelry
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I bought JBL headphones and found out they have these holes on both sides. What are they for? They're empty and kinda deep, the headphones aren't wireless so I guess it's not
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Amazon.com: Sennheiser CX 150BT Bluetooth 5.0 Wireless Headphone - 10-hour Battery Life, USB-C Fast Charging, Two Device Connectivity - White (CX 150BT White) : Everything Else
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