Phone Handset, 6.0, f/2-Line Cordless Sys., Trilingual, Black (RCAH5250RE1) Category: Telephone Handsets Compatible for use as extra handset with RCA 25210RE1 or 25250RE1. This handset will not function independently without these systems. DECT 6.0 Technology Interference Free Communication Increased Clarity / Enhanced Security Wider Range / Network Friendly