magicJack is a device that plugs into a USB port on the user's computer and that has a standard RJ-11 phone jack into which any standard phone can be plugged. This allows the user to make unlimited phone calls to U.S. and Canada. It is a computer peripheral that, in combination with telephony service from the related YMAX Corporation, provides Internet-based telephone service to the United States and Canada. In 2011 the company introduced magicJack Plus, which no longer requires a computer.
The magicJack device works exclusively with the company's captive landline supplier and CLEC, YMAX. Voicemail is stored on the magicJack servers and is delivered via direct telephone access, and email with WAV audio file attachments. Downloadable feature upgrades for the magicJack USB dongle are available from third-party software companies.