Amazon.com: Sennheiser Consumer Audio CX True Wireless Earbuds - Bluetooth In-Ear Headphones with Passive Noise Cancellation, Customizable Touch Controls, Bass Boost, IPX4 and 27-hour Battery Life, Black : Electronics
Sennheiser CX 5.00G Headphone Black | Xtremeinn
Amazon.com: Sennheiser Consumer Audio CX 6.00 BT Wireless in-Ear Headphones, Bluetooth 4.2 with Qualcomm Apt-X, 6-Hour Battery Life, 1.5 Hour Fast USB Charging, Multi-Connection to 2 Devices, Black : Electronics