A very good price and the microphone is very clear even with just one earbud; have had mine for about two months.

Amazon product: Sennheiser CX 400BT True Wireless Earbuds – Bluetooth In-Ear Headphones for Music and Calls – with Long-Lasting Battery Life and Customizable Touch Controls, black
Customer Reviews:
I have found perfection in sound from these Sennheiser CX 400BT. The Jabra 75T were so disappointing with more features but bass was sad. Sennheiser has a perfect sound through the mids and treble to a wonderful bass. The choice of four gel plugs, that are structurally the best, will work for all different sized ears. Yes they do not have ACA but for those of us that sound is everything it is an easy trade off.