The Netgear High Speed DOCSIS 3.0 Cable Modem CM400AZNA is a wireless modem designed for home networking and connectivity. With a sleek black design and DOCSIS 3.0 standard compatibility, this modem offers high-speed internet access. The model CM400-1AZNAS provides reliable connectivity for computers, tablets, and other networking devices. Made by NETGEAR, a trusted brand in networking technology, this modem is a top choice for those looking for a seamless and efficient internet connection.