https://community.sony.dk/t5/portable-audio/mdr-rf811rk-wireless-headphones/m-p/3860707#M12237 <P>Hi, I'm consider purchasing some of these headphones but have seen conflicting specifications. Please can anyone confirm whether these are Bluetooth or not. I would also be grateful for any opinions as to whether these are any good for listening to heavy loud music with lots of bass. Thanks&nbsp;</P> Fri, 11 Mar 2022 14:14:12 GMT chjelle 2022-03-11T14:14:12Z https://community.sony.dk/t5/portable-audio/mdr-rf811rk-wireless-headphones/m-p/3860707#M12237 <P>Hi, I'm consider purchasing some of these headphones but have seen conflicting specifications. Please can anyone confirm whether these are Bluetooth or not. I would also be grateful for any opinions as to whether these are any good for listening to heavy loud music with lots of bass. Thanks&nbsp;</P> Fri, 11 Mar 2022 14:14:12 GMT https://community.sony.dk/t5/portable-audio/mdr-rf811rk-wireless-headphones/m-p/3860707#M12237 chjelle 2022-03-11T14:14:12Z https://community.sony.dk/t5/portable-audio/mdr-rf811rk-wireless-headphones/m-p/3860709#M12238 <P>Not Bluetooth but Radio Frequency (RF).</P> Fri, 11 Mar 2022 14:25:03 GMT https://community.sony.dk/t5/portable-audio/mdr-rf811rk-wireless-headphones/m-p/3860709#M12238 Marino.Manolo 2022-03-11T14:25:03Z