Longest Range Expandable System - Grows with your business Up to 4 lines (with 4 base units) and 36 handsets. Audio In Jack for Music/Sales Message on Hold Vibration Mode Caller ID With Call Waiting - Stores 30 Calls Frequency Hopping Security - 200 times per second 3 hours talk time / 40 hours standby time © PERTH COMMUNICATIONS STRATFORD 2003