Siemens Gigaset SL78h Additional Handset meet the highest standards regarding design, technology and environmental friendliness. A unique design concept using solid metal underscores the high quality of the handset and charging cradle. Special emphasis was placed on ease of use: Users can move through the newly designed menu system with its intuitive icons using a central 5-way navigation key (four direction keys plus a middle key) on the handset. Metal dome key technology with its clear pressure point gives a completely new feel. Ideal legibility is ensured by the large TFT QVGA color display with 256,000 colors (240 x 320 pixels). In addition, both phones offer excellent sound quality even when used in full-duplex handsfree mode. If desired, users can also mute the phones and define VIP users. When the latter call, an acoustic signal is emitted despite the fact that the phone is muted.