Features •DTMF / FSK Caller ID •Up to 50 Incoming Calls •Up to 15 Outgoing Calls •One Way Speaker Phone (Monitor) •Pre-Dial and Redial Function •Last Number Redial •Ringer Selectable, Ringer Volume Adjustable •Anti Theft Function (Prevent Another Parallel Phone Use) •LCD Display Clock and Call Timer •Flash Time Selectable ( 90 / 95 / 100 / 120 / 180 / 300 / 600 / 1000ms) •Contrast Adjustable •Music On Hold •Do Not Disturb •Surge Protection •Works Without Batteries •Extra RJ 11 Port •Available Color: Black / White