The Monoprice Dual Driver headphones with Active Noise Cancelling offers exceptional sound quality, punchy bass, and crisp clear highs due to the 40mm and 20mm headphone drivers built into each cup. The hybrid active noise cancelling blocks unnecessary distractions to let you focus on what matters, and the multi?mic array allows for clear phone calls. Pair to two separate devices with multi?point Bluetooth pairing, easily switching between devices. Listen all day with a battery life of up to 70 hours of playback combined with exceptional comfort in a foldable design.