You can turn your iPhone or iPad into E-Songbook by installing the CAVS RS II Client app into the device. The required hardware specification for the Apple devices are

• iPhone – Version 4 or higher
• iPad – Version 2 or higher
• iPad mini – All

There are two versions of the CAVS RS II Client app. The first is the free version that is downloadable from below. The second is the full version that you can purchase from below. Both the free and full versions can

• Import the song list wirelessly from CAVS Karaoke players
• Display more than 1 million songs in 40 different languages
• Scroll, sort, search, and reserve the songs
• Create and store My Favorite Song Lists for unlimited number of users
• Score singers wirelessly in Singing Contests with options for weighting
• Receive & send messages including the next to sing, next next to sing, etc.
• Connect unlimited number of E-Songbooks, iPhone, iPad, and Androids
• Use a local network and does not require Internet
• Control the music volume, balance, microphone volume, echo, reverb, etc.*

The difference between the free and the full version of CAVS RS II Client program/app is that the free version does not but the full version does have remote control functions such as Play, Stop, Pause, Next, or Cancel. This difference is due to the concern that someone may stop or cancel someone else’s song. In the full version, you can

• Play, Stop, or Pause songs
• Shuffle or Cancel songs in Queue
• Start the Next song in Queue

The full version is designed for the operators of the karaoke player as it gives him the full control as well as the mobility