![Amazon.com: JBL Live 660NC - Wireless Over-Ear Noise Cancelling Headphones with Long Lasting Battery and Voice Assistant - Black, Medium : Electronics Amazon.com: JBL Live 660NC - Wireless Over-Ear Noise Cancelling Headphones with Long Lasting Battery and Voice Assistant - Black, Medium : Electronics](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/61mqdpfgEJS.jpg)
Amazon.com: JBL Live 660NC - Wireless Over-Ear Noise Cancelling Headphones with Long Lasting Battery and Voice Assistant - Black, Medium : Electronics
![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 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](https://preview.redd.it/zkm9dihmx0b51.jpg?width=640&crop=smart&auto=webp&s=c6fb2c50840cbdf3e8d2c804c1cbd886c38fe677)
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
![Amazon.com: JBL Tune 710BT Wireless Over-Ear Bluetooth Headphones with Microphone, 50H Battery, Hands-Free Calls, Portable (Blue) : Electronics Amazon.com: JBL Tune 710BT Wireless Over-Ear Bluetooth Headphones with Microphone, 50H Battery, Hands-Free Calls, Portable (Blue) : Electronics](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/61WaMevsRHS.jpg)