![HD 660 S 2 Refurbished | In-Ear, Noise-Canceling, Wireless, Bluetooth, Music; Entertainment, Travel, Sports - Sennheiser Discover True Sound HD 660 S 2 Refurbished | In-Ear, Noise-Canceling, Wireless, Bluetooth, Music; Entertainment, Travel, Sports - Sennheiser Discover True Sound](https://uk.sennheiser-hearing.com/cdn/shop/products/660S2.1_60fa5b21-cc0d-4597-9ed4-27ffbcd74ac2_530x@2x.png?v=1692709697)
HD 660 S 2 Refurbished | In-Ear, Noise-Canceling, Wireless, Bluetooth, Music; Entertainment, Travel, Sports - Sennheiser Discover True Sound
![Sennheiser HD 660 S Open, Dynamic Lightweight Circumaural Headphones with Low Impedence and Improved Transducer Design for Audiophiles, Black: Amazon.co.uk: Musical Instruments & DJ Sennheiser HD 660 S Open, Dynamic Lightweight Circumaural Headphones with Low Impedence and Improved Transducer Design for Audiophiles, Black: Amazon.co.uk: Musical Instruments & DJ](https://m.media-amazon.com/images/I/71tk+vMP4DL._AC_UF1000,1000_QL80_.jpg)
Sennheiser HD 660 S Open, Dynamic Lightweight Circumaural Headphones with Low Impedence and Improved Transducer Design for Audiophiles, Black: Amazon.co.uk: Musical Instruments & DJ
![HD 660 S 2 Refurbished | In-Ear, Noise-Canceling, Wireless, Bluetooth, Music; Entertainment, Travel, Sports - Sennheiser Discover True Sound HD 660 S 2 Refurbished | In-Ear, Noise-Canceling, Wireless, Bluetooth, Music; Entertainment, Travel, Sports - Sennheiser Discover True Sound](https://uk.sennheiser-hearing.com/cdn/shop/products/HD660S2.5_c0ca811a-3afb-4eac-b1e9-a2b5a8506fa2_1024x1024@2x.png?v=1692709697)