Fanstel G99M Large Screen Caller ID with Call Waiting Display Box Landline Telephone Accessory Type II Large Backlit Screen^Caller ID - Receives and displays name, number and calling time^Caller ID on Call Waiting - Receives and displays name, number and calling time of a waiting caller during a telephone conversation^Memory Capacity - Stores calling numbers, names, and calling times of last 99 calls, answered or not^4 Buttons - DIAL/FLASH, DELETE, FORWARD REVIEW, and BACKWARD REVIEW. Please refer the Instruction Manual before use.