Due apologies to the regulars on this thread and let me start by giving the context of this sudden post. I am putting up the details of my bluetooth helmet in response to a query raised regarding the same in another thread. For specifics, please check out the link
http://www.team-bhp.com/forum/motorb...ml#post3056928. Since that thread is devoted to the RE Thunderbird, I feel this place is more appropriate for an update on helmet bluetooth.
I had wanted a bluetooth helmet, so as to be able to communicate with fellow riders. The problem is that the price for a good blue tooth kit (imported) is upwards of Rs. 15,000. Add to that the cost of a good helmet and you are talking of some serious money, which as a percentage of my bike's onroad price was too high. Solution: Imported a helmet from a chinese manufacturer, who is a supplier to some European brands.
Functions:
The helmet has a single dial for controlling the bluetooth functions, located on the outer left side, below the visor. The dial can be rotated back and forth for increase and decrease of the volume. Pressing the dial will connect or disconnect a call. A long press takes it into pairing mode and it can be paired with other devices and/or helmets with bluetooth kits.
The manufacturer claims a range of 100 meters for connecting with other helmets and reliable connectivity upto speeds of 120 Kmph.
It has a single headphone slipped into the lining of the left side of the helmet. The whole left side cushion is created different from the right side, so as to isolate the left ear from wind noise etc and provide a better sound. As per the manufacturer, reason for the single left side speaker is that if you have speakers on both sides, you may miss out on the street sounds, which are critical for a rider to navigate the road and traffic.
Actual working:
I use a company provided blackberry, which has connectivity problems in general. It will sometimes pair with the bluetooth on my Linea and at other times play truant. Using it with the helmet has been difficult for the same reasons. When it does connect There is still some noise. I have tried the connection with a Samsung DUOS mobile and it was better, but cannot comment much on it, as I have not had the chance to try it out for a longer duration. My friend has an identical helmet and he finds it to be working well with his Samsung mobile.
Since my friend lives in a different part of India, more than 2000 kms away, we have not had the chance to test the claimed 100 meters range for helmet to helmet connectivity. I doubt if it will be more than 50 meters in the real world. Which is still good enough for a small group.
My helmet is one size larger than my head's size and hence the wind does get in and I am not able to enjoy the complete acoustic effect of the way the speaker is built in and expected to function.
At speeds above 60, the wind noise starts building up and one has to really strain to hear the sound from the speaker. Beyond 70, I cannot hear anything.

What is my view:
I really like the quality of the helmet, cushion, finish and the fact that it has a bluetooth. But the bluetooth has turned out to be more of a novelty than a functional advantage. The wind noise and connectivity have reduced my ability to benefit from the feature. I would like to hear comments from someone who has used a more expensive/ better set up and if their experience is any different from mine (I hope it is).
Make shift Solution:
Rather than buying a helmet with an inbuilt bluetooth, it is better to buy a good kit separately from the helmet. This way, when you change the helmet, you can transfer the kit to the new helmet. While I chew on this problem, I got myself a simple jabra set up, which is rated among the top 10 bluetooth kits by some websites and costs about Rs. 3000/- (not sure of the exact price, wife bought it). It has a long stand by time and handles wind noise well. Also, because the ear phones fit into the ears, they cancel out the road noise better. Of course I may be compromising my ability to hear road sounds.
I am still experimenting and looking for a better solution.