2 lines provide more flexibility in your home or office Digital answering system includes a mailbox for each phone line. Get up to 14 minutes of recording time for each mailbox . DECT 6.0 digital technology for secure, crystal clear calls. Handset and base speakerphone s let you multitask while you talk. Features Dual Caller ID/Call Waiting with 50-number storage. Expandable up to 12 cordless handsets to suit your growing home or business. Conference between an outside line and up to 4 cordless handsets . Headset-compatible (2.5mm jack) for more hands-free flexibility. ATT TL88102 DECT 6.0 Digital 2-Line Cordless Phone With Answering, Silver/Black is one of many Multi-Line Cordless Phones available through Office Depot. Made by AT&T.