Nokia bh-503 is one nice bluetooth with good quality. Battery backup is very good no need to charge everyday, high qualiti of sound and also very comfortable and it also supports 2 device connect at one time, we can also use nokia bh-503 for call and it is compatiblein almose all brand of phone.it is very comfortable and stylest look, Bluetooth has all functions key on it for music play/pause next, previous, call answering, call disconecting, volme upp& volume down .nokia bh-503 is one of the best bluetooth I ever use .