Sennheiser CX 400BT True Wireless ( Black / White )
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 400-ll Precision, Audio, Headphones & Headsets on Carousell
Sennheiser CX 400 Portable earbud headphones at Crutchfield