Feel every beat with 40mm drivers that deliver deep, rich sound with clear treble. Lock out or connect with the world thanks to Hybrid Active Noise Cancellation up to -35dB and Transparency Mode. Full control is at your fingertips with the cardoO app to easily manage settings, modes, and system updates. Speak with confidence thanks to 4-microphone technology that ensures clear, crisp calls in all conditions. Wireless freedom that lasts – Enjoy up to 55 hours of playback, or get 4 hours after just a 10-minute charge.