I have chosen deliberately for a headset and not for handsfree clip, because I think the phone with the speaker for an unpleasant feature. In addition, there is a rattling noise for the caller. I have a Gigaset SX810 ISDN. As for the short "socket" of the headset, the one who has pre-Rezensierer complained to which I can only add that you have to remove the rubber nipple, which is intended to protect the plug connection when not in use completely. If one presses the jack into the resulting recess, the headset is functioning properly. Secure the phone now with the bracket on the waistband and I can cheerfully call, giving as many or cook my budget ..... Wonderful. Only the earbuds uncomfortable after a while. Then I change just the ear ...;)