Store up to 100 Names, Store Up to 2 Numbers per Name, Alphabetical Search, Personalized Ringers, Transfer Single Listing or Entire Phonebook DirectLink Technology - 2-way Radio Communication Mute & Hold Features VoiceMail Waiting Indicator Intercom or Call Transfer Between Handsets 20 Ringer Options, 10 melodies & 10 tones Trilingual Menu Displays - English, French, Spanish Room, Baby Monitoring Battery Level and Clock Display Earpiece & Ringer Volume Control Ringer Off Option Headset Compatible Belt Clip Included Handset Battery Type - BT-446 NiMH Please Note - The TCX905 accessory handset will not operate until it is registered to a compatible Uniden main base system Compatible with the following Uniden 5.8 GHz Digital Expandable Systems - TRU9 series - (TRU9460, TRU9465, TRU9466, TRU9480, TRU9485, TRU9488, TRU9496), TRU8 series (TRU8860, TRU8865, TRU8866, TRU8880, TRU8885, TRU8888), CLX series (CLX465, CLX485), Elite series (ELT560, ELBT585, ELBT595), UIP18 series (UIP1868P and UIP1869V)