Worlds of Wonder or WoW was a 1980s American toy company…[that sold] the Jaminator (1990), an electronic air guitar that plays different riffs depended on which buttons are pressed on the neck and also provides basic rhythm accompaniment with a small keyboard and drum pads.
An electric guitar is a fretted stringed instrument with a neck and body that uses a pickup to convert the vibration of its strings into electrical signals.
A keytar is a relatively lightweight electronic keyboard (with or without a built-in synthesizer) that is supported by a strap around the neck and shoulders, similar to the way a guitar is supported by a strap.
Hard rock is a loosely defined subgenre of rock music that began in the mid-1960s, with the garage, psychedelic and blues rock movements. It is typified by a heavy use of aggressive vocals, distorted electric guitars, bass guitar, drums, and often accompanied with keyboards.
In various popular music styles, riff refers to a brief, relaxed phrase repeated over changing melodies.