The Motorola 1-4 line wireless phone system is easy to set up. Start with the Motorola base station, plug the base station into any phone jack and wirelessly connect the base station and cordless handset, only one jack is required. You can wirelessly expand up to ten Motorola ML desk phones and/or cordless handsets and support up to four phone lines. Full duplex speaker phone along with six-way conferencing. Features Auto Attendant/Digital Receptionist, Call Waiting-Caller ID, Call Transfer, 99 Name and Number Phone Book with 99 Name and Number Caller ID history. Intercom and Do Not Disturb feature. Distinctive ring for each line including ring volume control, handset volume control and speaker phone volume control. Hearing aid compatible, includes visual ringer and mute capability. Caller ID features automatic date and time set, caller ID memory, caller ID review with delete and dial back function. Answering machine features include ten number message mailboxes and an answering system status indicator with call screening, message power failure protection. Also includes new message indicator, message counter and recording time of up to 200 minutes. Remote message retrieval with voice time/day stamp.