These Headphones are a great addition to your bluetooth device. They are small and you do dot have a battery pack hanging around your neck or sitting behind your head. they are as comfortable as any in ear headphones I have ever used. My husband had gotten a pair for beta testing a product and I fell in love with them, When I saw them on sale here I snapped up a second pair. Only downside is not getting eartips or stabilizers that came with them originally. It will cost an extra $20 to replace these which makes the value go down quite a bit. They work really well and have a nice range. I can have my iphone in the living room and work in the kitchen which is 2 rooms away through walls. I use them with my iphone 4s, kindle fire, hp laptop, PSP and my son's Nabi2.
One of the best things is they are water resistant. I have accidentally dunked mine in water a couple times leaning over with them around my neck and they still work like a charm.