PHILIPS M550 Digital cordless phones Telephone 1.7GHz / Electromagnetic removed cordless phones (White) Product Features - Crisp voice quality - 1.7GHz / ECO mode feature (remove electromagnetic waves) / Intercom and conference call features Speakerphone capabilities / Caller ID display (CID) / Save outgoing number (20): redial function / Save outgoing number (20): redial function Various ringtones (10) / Telephone book function (100) / LCD backlight function (Green color), optical dial feature (White color)/ Alarm, VIP bell function / Alarm, VIP bell function / Additional phone features: 3 Specifications - Maximum talk time : 16 hours / Maximum standby time : 250 hours (LED off) / Maximum standby time : 250 hours (LED off) / Operating power : Input - 100 ~ 240V / 50 ~ 60Hz / 200mA, Output - (1) 6V 300mA (2) 6V 200mA / Weight & dimensions : Telephones - 171g / 213mm X 50mm X 44mm, Stand - 157g / 215mm X 50mm X 35mm /