Enjoy a fast and stable connection with bluetooth 5.0 and advanced QCC3003 Bluetooth chip. A built-in CVC 6.0 microphone guarantees hands-free calls in clear language, you can take/make hassle-free calls and access your voice assistant easily. You can enjoy dynamic and immersive tunes in a 10m/33ft wireless range without disconnection.A-built-in 650 mAH Li-ion battery delivers approximately 72 hours of power. Keep your tunes playing throughout the day. FUSION A70 foldable bluetooth headphones use proprietary 40mm large-aperture driver to deliver riveting sound and a thumping bass, brings balanced midbass and bright treble for you. Bluetooth wireless headphones do quite well in delivering the high-fidelity sound and helping you enjoy your favorite tracks better.