Yealink Dect Phone Repeater RT30, Wireless phone, Frequency 1880 - 1900 MHz, 1920 - 1930 MHz, Gray, Desktop, Wall-mountable, Wall Mountable, Elegant Design, Up to 6 repeaters per base station, Support HD voice calls. Yealink DECT repeater RT30, designed in accordance with Digital Enhanced Cordless Telecommunication (DECT) standard, is characterized by easy installation and a user friendly display concept.