Uniden TCX440 5.8 GHz Accessory Handset with Color LCD (Silver) 5.8 GHz digital signal; for use with Uniden CLX, T8, ELT, and VoIP systems Full-color LCD, supports downloadable images Handset and base speakerphones; recordable ringtones Caller ID/call waiting, 100-call memory; 100-name and 400-number phone directory Directly accesses many of your base unit's key features