I love that funky little function that allows the slide boom feature which activates the device, kind of like Inspector Gadget "Go-Go Gadget Headset"! Okay, perhaps I am overexaderating, but it truly is a greeat module. Whenever I use it, especially when I am driving, people do not here the inhermetance from the street, yet they can hear the destinct song on the radio; which I conveniently turned down to a whisper. This device is awesome! Not to mention the several colors on the indicator, for instance, when charging or when the battery is low it will be red, yellow when there 20&lt;power&lt;80 and finally green when fully charged. When turned on the indicator flashes blue and pulsate when in use, thats 4 colors! A must buy (from what I hear the H700 is equally as good and sleaker)