The Motorola H300 is the ultimate handsfree headset for those that want a headset that they will be able to use forever. Why do I say this? Because, this does not have a non-removable rechargeable battery like most handsfree headsets. Instead, it can be operated with a single AAA battery. I just got it, so I cannot verify the performance of the battery, but knowing that I won't have to throw this away in a couple of years is worth it. The features include call accept, call deny, mute, hold, voice dialing, 3 way calling, and you can turn off the blinking blue light (if you're so inclined). Even though it takes a AAA battery, it's about the same size as a comparable rechargeable headset. It may be 2 mm thicker, but the same length as most. It works great and is a no nonsense kind of headset. If you want a basic headset that does about the same as those expensive ones, and you want the security of just changing a battery, this is the headset for you. If I have any problems with the duration of the battery or with its operation, I will update this review accordingly (check the date of review to gauge how long since purchase... if no update, then no problem).