AT&T E252 Accessory Cordless Handset, Gray | Requires an AT&T E2562 Expandable Phone System to Operate 2.4 GHz frequency-hopping digital spread spectrum signal For use with AT&T E2562 expandable phone system Caller ID/call waiting, 50-call memory Answering system access from handset Intercom, conferencing, speakerphone; illuminated keypad