Eliminate distractions and focus on what matters with Sprout’s Harmonic 4.0 Bluetooth Headphones. Active Noise Cancellation and Ambient Sound Harmonic 4.0 combines powerful 40mm drivers with Hybrid Active Noise Cancellation technology for an immersive sound experience. This clever feature uses quad external and internal earcup microphones to neutralise ambient noise and block out distractions, bringing you closer to the music. When you need to stay aware of your surroundings, simply switch to Ambient Sound mode, which lets outside noise in without missing a beat. Share your sound Our Duolink™ technology lets you share sound between any two DuoLink™ compatible headphones, making them perfect for travel partners or entertaining kids. Power on and on Whether you're commuting or working through the day, the Harmonic 4.0 offers up to 50 hours of playback time, keeping your music going for as long as you need. In a rush? A quick 10-minute charge provides up to 5 hours of listening time. Designed for convenience Harmonic 4.0 swivels into its durable carry case and includes a USB-C charging cable, a plane adapter, as well as an aux cable for wired listening when the battery runs out. It also features a flexible headband and over-ear soft memory foam earpads, making it perfect for all-day wear. Plus, with a built-in microphone, it’s ideal for taking calls on the go.