the part lasts about 4 hours and does its job. I use it only for audio books and have even become a second to change. for music certainly only partially suitable and I have a Aneres larger silicone partial plan made since the original is very small and does not seal properly. you have to get it just to run, means only Turn on Bluetooth on the phone, then press the button long until he red / blue flashes and then go on mobile on connect, so recognized on the unit click. then is the connection.
