I am wondered the way this product is positioned and sold.  I was thrilled to see that the price of this bluetooth was Rs.1000 in India( 20 USD approx), and trust me that happiness ended in 4 days flat when my headset started making beep sounds indicating me to "change battery".  I searched and searched for AAAA battery for a week now and finally found a dealer who is selling a pair of batteries for 7$.  Jabra BT2040 manual claims talk time of 8 hours using a single AAAA battery.  I use approx bluetooth for 2-3 hours a day when I am on the drive which works out to be like 3.5$ of battery for every 2-3 days, and a whopping 35$ battery expense in a month!
My honest suggestion is please dont buy this just because this is cheap! A product like this was not expected from Jabra, to be sold in India where in you dont get AAAA rechargeable batteries and one time use batteries are prices so damn high.  I wanted to post this to Jabra but their website has no link which puts me onto someone from customer care.  Jabra's India distributor Nextel was very smart, he told that they had got this consignment into country and got it cleared as he knew the problem this would bring to him.
Pl dont buy this.