I had only a Samsung WEP-470 in use and was not satisfied by the volume. It was very quiet. Now I've bought Sony VH-110 and am very excited. Despite the low price, I have no defects found. The volume is very good and the voices are clear and understandable ..... also the interlocutor. The range has surprised me: Had my phone forgotten in the living room and could telephone in the kitchen still, even through a wall by .... that went not with my first headset. My Gigaset SL 400 is very compatible with the Sony and the coupling was without its difficulties. All around a successful device. Buy recommendation!
Siemens Gigaset SL400 High End DECT cordless handset with color display, USB port, Bluetooth, metal / black