Sennheiser CX 400BT True Wireless Earbuds - Bluetooth In-Ear Headphones for Music and Calls - with Passive Noise Cancellation and Customisable Touch Controls, White: Amazon.co.uk: Electronics & Photo
Sennheiser CX 400BT Review: Everyday great sound at $299 » EFTM
Best Buy: Sennheiser CX 400BT True Wireless Earbud Headphones Black CX400TW1 Black
Amazon.com: Sennheiser CX 400BT True Wireless Earbuds - Bluetooth In-Ear Headphones for Music and Calls - with Noise Cancellation and Customizable Touch Controls, Black : Everything Else
Sennheiser CX 400BT review: Amazing wireless sound for $100
Sennheiser CX 400BT Review: Everyday great sound at $299 » EFTM