AT&T 2300 2.4GHz Expansion Handset for 2320 2325 2355 For use with your current AT&T 2320, 2325, 2355, or 2365 system 2.4 GHz DSS with frequency hopping technology Last-5-number redial; 2-way page and intercom Caller ID/call waiting capability with 90-call memory Speakerphone for hands-free conversations