Newly Released Sennheiser CX Series Earphones: In particular, the CX 3.00 and CX 5.00G | Headphone Reviews and Discussion - Head-Fi.org
Sennheiser Cx5.00i/g In Ear Earphones 3.5mm Stereo Dynamic Headset Sport Earbuds High Performance With Mic For Iphone Androd - Earphones & Headphones - AliExpress