![HD 660 S 2 | In-Ear, Noise-Canceling, Wireless, Bluetooth, Music; Entertainment, Travel, Sports - Sennheiser Discover True Sound HD 660 S 2 | In-Ear, Noise-Canceling, Wireless, Bluetooth, Music; Entertainment, Travel, Sports - Sennheiser Discover True Sound](https://cdn.shopify.com/s/files/1/0553/9636/8578/products/660S2.1_530x@2x.png?v=1674735602)
HD 660 S 2 | In-Ear, Noise-Canceling, Wireless, Bluetooth, Music; Entertainment, Travel, Sports - Sennheiser Discover True Sound
![Sennheiser HD 660 S Open, Lightweight Audiophile Over-Ear Headphones with Low Impedance and Improved Transducer System, Black: Amazon.de: Electronics & Photo Sennheiser HD 660 S Open, Lightweight Audiophile Over-Ear Headphones with Low Impedance and Improved Transducer System, Black: Amazon.de: Electronics & Photo](https://m.media-amazon.com/images/S/aplus-media/vc/6286fe3b-9704-431c-ad8a-a08c888f60d8.__CR0,0,2021,625_PT0_SX970_V1___.jpg)
Sennheiser HD 660 S Open, Lightweight Audiophile Over-Ear Headphones with Low Impedance and Improved Transducer System, Black: Amazon.de: Electronics & Photo
![HD 660 S 2 | In-Ear, Noise-Canceling, Wireless, Bluetooth, Music; Entertainment, Travel, Sports - Sennheiser Discover True Sound HD 660 S 2 | In-Ear, Noise-Canceling, Wireless, Bluetooth, Music; Entertainment, Travel, Sports - Sennheiser Discover True Sound](https://cdn.shopify.com/s/files/1/0553/9636/8578/products/660S2.3_1024x1024@2x.png?v=1674735602)