Ergonomic Design - Fit securely into your ear, you just have to put it on, then it will work, no annoying wires from tangling or around the neck. Sound - Clear HD sound for audio books, podcasts and Netflix, decent for music and telephone calls. Built-in HD & sensitive microphone for clear conversations, echo suppression and noise isolation during calls. No echo, no noise, just like face to face. Battery - Has a Rechargeable Battery of 60mAH Which gives a playtime of 4-5 Hours on an average and approx 100 hours of standby time. Design - Without wire design, you can barely feel it, but still enjoy your wireless life. Compatible with most Bluetooth enabled devices, pairing only a few seconds.