Everything about the HPM-77 was designed for brilliant audio quality. It's def the headset to buy for listening to music the way it was supposed to be listened to on your mobile.
The built-in call answering button helps you find yourself when an incoming call interrupts your music listening.
The clear sound, deep bass and performance is amazing while
the microphone, call answer key and 3.5 mm jack to swap headphones are all built-in which is really useful.
It was also compatible with both my C702 & K810i
I would definately recommend this product!!!