not comfortable to wear on your ear although they have given 3 ear buds. The device moves out very easily, so when you are running or riding, you can loose. Voice to the receiving end is very low.. one has to speak loud to be heard.
I had to use another devices clip to use it on my ear, connecting with 2 mobiles is really good but some times, voice/sound breakage comes in..However, overall, i am satisfied with the product. Battery lasts for 1.5 hours while continuously talking.