- Panasonic repeater- Extends the range of the KX-TG753X, TG654X, TG653X, TG658X, TG651X, TG4053B, TG403X, TG402X, AND TG401X series- Doubles the effective transmission distance between the base unit and the cordless handset~~on 2010 Panasonic Cordless TelephonesKXTA405B