Permanently blocks up to 150 unwanted numbers; Enlarged, amber backlit keypad & large 1.6″ white backlit handset LCD; Handset-to-handset intercom & 3-way conference calling; Includes ringer ID, Call Waiting/Caller ID, silent mode, handset filter & intelligent Eco mode; Expandable up to 6 handsets; Includes 1 handsets & 2 batteries;