Husqvarna X-SYNC protects your hearing while enabling Bluetooth® connectivity to your mobile phone. Developed by Husqvarna for professional users, this robust and comfortable hearing protection is very easy and intuitive to use. The active hearing protection allows you to hear ambient sound, use your mobile phone hands-free, stream audio or listen to the built-in FM radio, while protecting your ears from harmful noise. Compatible with Husqvarna Technical helmet and Arborist Spire helmets. Two adapters are included to fit several helmets.