2 years back I ordered Jabra Talk 45 Bluetooth Headset Bluetooth Headset, and it is a cool in ear mono Bluetooth headset. Recently while I make calls people on the other end was complaining that my sound is not audible (feeble sound). I thought it will be an issue with my Mic (hardware issue). Before taking it to service centre I decided to do a reset of the device (Hard Reset), and that worked. So if you have any issues with Mic or earpiece you may try a Hard reset of you Jabra Bluetooth headset, which may solve the problem.
Here is how you can Hard reset your Jabra Talk 45
1. Turn on your headset
2. Press Answer/end button and the Voice button at the same time for 7 seconds.
3. The indicator light will blink in white color
5. Jabra Talk 45 will restart
Remove previous pairing from your devices and pair the headset again.