Premium speakers and HD voice for authentic conversations and full music playback. You can activate the active noise cancellation to eliminate virtually all low-frequency sounds, such as the hum of an air conditioner. The active noise cancellation uses advanced microphones to monitor and reduce disruptive noises. Excellent active noise cancellation and an integrated busylight that signals "Do Not Disturb" to enhance productivity. Connects simultaneously to two devices for calls and music thanks to dual Bluetooth connectivity. Wireless range of up to 30 meters from the connected device. Comfortable ear cushions with a leather-like feel for an on-ear fit and all-day comfort.