The Speedphone 10 is for the router Telekom (W 724 V / Type B) ideal. The quality and included technology convinced me and logging in to the router is really easy. At the computer can manage the phone and to enter all settings and numbers just fine. I have bought two to also house internal calls can. In addition, several numbers are the IP telephony change yes awarded (with me 3), can be telephoned so separately with each Speedphone 10 externally or can be called. The keyboard is illuminated as the display, which can be adjusted in a number of indicators on the menu. The charging cradle can be placed at any location. The Speedphone 10 communicates with the router wirelessly. In addition, small but really good useful manual delivery is settled. A PDF can be downloaded as a manual at Telekom. The only drawback for me and apparently with other buyers were the supplied rechargeable batteries, which were Ratz Fatz displayed as empty. Here is a strong buy recommendation please immediately order at AmazonVarta Phone Accu AAA Ni-Mh battery (3x 2-pack, 800 mAh. These batteries operate my Speedphone 10 until today properly. I ask this only overnight in the supplied chargers and can all day without much battery loss (display on Speedphone) calls, etc. I hope that my review is helpful.