The phone has more features, but I can not say anything because I do not necessarily need this and have Deher untested.
But unfortunately the Freisprecheinreichtung and also the earpiece volume a little too quiet. In entpsrechender Geräuschkullise in the room or even wearers like me have it because at times a little difficult. Therefore, a star deduction. I'll try out a headband headset with 2.5 jack.
Otherwise I can not find anything negative and recommend buying if you do not often make calls in noisy environments
needs.
SUPPLEMENTARY 26/12/2011:
Now I have found for myself as a hearing aid user optimals Headset: Jabra GN 2400 Duo BIZ. These things I have not purchased through Amazon.