The Panasonic Cordless Phone System KX-TGD613B is a reliable and expandable phone system that includes 3 handsets with the ability to add up to 6 handsets for a total of 6 phone lines. This cordless telephone system features a sleek black design and various useful features such as LCD display, high/low ringer, volume control, speakerphone, caller ID, call block, mute, and hold. With the convenience of wireless communication and the added functionality of call blocking, this Panasonic phone system is a practical choice for households or small businesses looking for a versatile and efficient telephone solution.