Final Update 4/16/2011
Volume on the right side earbud on the replacement set dropped down to very low volume the same as the first set did, I can no longer hear anything from that side although as before the microphone still works on the side.
As before these have not been mistreated in the least. These are were great product when working, but hard to say good things if they won't last more than this length of time and use.
Feel the need to lower my rating at this point, 4 stars when working, 2 stars now that the second pair failed on the same side.
With very little and very gentle use, the right side earbud volume dropped so low that you can't hear much even at very high settings on the phone or mp3 player. The microphone is on this side, but mic continues to work as does the right side earbud.
Called Jabra support, then had to reply to an Email with receipt scan attached (you can also Fax) now waiting to see results. They claim replacement will be sent out 5-7 days after they see the receipt.
I asked about the fact that I could not register products on their web site and was told they don't register your products any longer, so be sure to keep your sales receipts.
Warranty replacement headset arrived from Jabra just as they said it would, speedy support, product working as it should.
I primarily needed a good microphone and headset for phone calls, stereo music listening on my phone was an after thought for the most part as I have an iPod for that, but hearing a phone call in both ears is a real plus for me.
Very nice to find out that this Jabra Rhythm headset does have a good microphone and I can be heard without problems or background noise, AND I can hear my phone calls at a much reduced volume level which is always a good thing.
Fit was perfect right out of the box without the need to change ear tips, but it does come with two other sized, cord is soft and flexible with a good length to reach either my belt holder , car seat or desk. Cord is just over 40 inches, plug to the "Y", micophone on cord hangs right at mouth level on me.
EarBud marked "Right" is longer as it goes around the back of your head rather than hanging in front of you, bud marked "Left" has the mic on the line and is shorter so mic hangs by your mouth.
In case you might have a phone that the connections are different on, it comes with an adapter to change the connections, another nice touch from Jabra.
Music does not sound as good as it does with my more expensive earbuds on an iPod, but then I wouldn't expect it to with either a phone or this headset, however it sounds pretty good and will come in handy when I don't have my iPod with me.
Be sure to only use one side in your ear if you are driving as these do seal outside sounds out pretty well.
Some tech info;
Headset Type Stereo
Wearing style In-the-ear
Cable length 1060 mm (41.7 in)
Connector 4-pole, gold plated 3.5 mm plug
Comfort Accessories 3 pairs of sound isolating ear buds in diferent sizes (s, m, l)
Compatibility Phones with 3.5 mm plug
Dimensions, main unit L 32.5 mm x H 17.5 mm x W13.5 mm (L 1.28 in x H 0.69 in x W 0.53 in)
Weight 12.83 grams (0.45 oz)
Microphones Sensitivity -55dB +/-4dB
1 Omni-directional electrets microphone
Wind noise protection Yes, up to 3 meters per second (m/s)
Speaker 8.6 mm (0.34 in) dynamic speaker
Sensitivity 107 +/-3dB
Input impedance 32 +/-15% Ohm
Rated power 4 mW, Max power 8 mW
Frequency response 18-21 kHz
Operating temperature -10° C to 65° C (-14 F to 149 F)
Storage temperature -10° C to 45° C (-14 F to 113 F)
Waterproof IP X2 standard
Features Listen to music and talk. Control box on microphone: answer/end calls, skip tracks*.
Sound isolating ear buds in 3 sizes, Wind-noise protection on the microphone.
What's in the package? 1 Headset, 1 Cable Clip, 1 phone adapter for most Nokia, Samsung & Sony Ericsson phones with 3.5mm plug,
3 pairs of sound isolating ear buds (s, m, l), 1 Warranty, 1 Warning Leaflet and 1 Quick Start Manual
Warranty One-year limited warranty
* Phone dependent. Compatible with Apple iPhone® & iPod touch®