A friend called my attention to this hands-free clip and I ordered him. I wanted to pursue this as a further handset at my Fritz box 7390 with DECT connection. Log works and of course you can make calls with him but unfortunately the clip does not support access to the internal phonebook of Fritzbox. One would thus storing all number extra again and with this tiny display - oh no! The design and the display look like from the 90s. Inputs react sluggishly. The clip is as mentioned by other testers, too loose and not stick to clothing. Another major point of criticism: The clip While a support DECT Eco Mode (switching off the radio radiation when not in use) but in connection with the Fritz box is this not supported. The Gigaset and of course the FritzFon the DECT signal is set in standby to 0%. So I would have with this clip lasting "Sonny Boy" (constantly base + clip = spark radiation exposure). Because of these reasons, the clip went back again. The clip of Siemens I also looked at times but that is too low (known issue). Solution for me: Headset + FritzFon = Handsfree