Sennheiser on Twitter: "Bring your #PXC550ii to the next level with the latest firmware update (1.6.2). Aside from battery improvement and pairing enhancements, it makes your listening experience even smoother. 📸 @stevekouta
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Sennheiser PXC 550 II Firmware update 1.6.2 – Arun James's guide to the Technological Galaxy
Sennheiser on Twitter: "The new PXC550-II firmware (v 1.5.21) ensures compatibility with iOS 13.4. Please update your PXC550-II to the new firmware before you update your phone to iOS 13.4 and enjoy