The Bluetooth headset profile is disabled on some iPaqs. This program will enable it. I tried it on my german 5450 and it worked. Perhaps it works on other iPaq devices too, but I'm not sure! The headset profile sends the sounds to a headset or eg to a Bluetooth car phone kit. You just have to connect the device with the Bluetooth Manager. An audio/voice gateway page appears in the Bluetooth settings. You use this patch on your own risk. No warranty!