Enjoy super Sennheiser sound wirelessly, and in comfort, with the CX7. 00BT. Enhanced bass technology delivers rich and powerful audio. Link up with your smart device in an instant with Bluetooth or NFC and enjoy the freedom of the cordless connection. With a supportive neckband for complete wearing comfort, they'll keep going for up to 10 hours, and you can take calls easily too with the simple integrated controls. Sennhesier Soundstage Sennheiser's acoustic technology achieves superior bass response compared to standard earphones. Read more… Low frequencies are deep, rich and detailed, while highs and mids remain delicate and clear. The result is the beautifully balanced soundstage that Sennheiser are renowned for. High Quality Wireless Connection Cut the cord and enjoy the freedom of wireless listening. Bluetooth supports Qualcomm apt-X tech for a super-stable and high quality connection, so you hear every detail. NFC devices link up with one touch, and the CX7s can connect to two devices at once. Voice prompts effortlessly keep you updated of pairing status and low battery level. Neckband Comfort & Control A sleek and robust neckband ensures maximum support for the most comfortable listen. The three-button remote gives you simple intuitive control over your music and allows for easy taking of phone calls with the integrated high quality mic. Snug-fitting ear-buds are designed to reduce ambient noise, and with four bud sizes included, you'll find the perfect fit. The CX7s keep going for up to ten hours off a single charge and can be kept securely in the soft storage pouch.