With noise cancelling technology, a lightweight design and long battery life, you can enjoy music for even longer without background noise. The dual noise sensor technology and the integrated V1 processor provide even better noise cancelling. So you can block out the world and enjoy pure music. Whether you're working from home or enjoying your favourite content, the... WH-CH720N have an ergonomic design, are lightweight and comfortable. And with up to 35 hours of battery life, you can wear them even longer. For maximum convenience, the Bluetooth® headphones can be paired with two Bluetooth devices simultaneously. The headphones recognise the device when a call comes in and automatically select it * .