Teashark is a mobile web browser for Java

Java (programming language)

Java is a programming language originally developed by James Gosling at Sun Microsystems and released in 1995 as a core component of Sun Microsystems' Java platform. The language derives much of its syntax from C and C++ but has a simpler object model and fewer low-level facilities...

 MIDP 2.0. It is a browsing client which works in cooperation with the Teashark servers which transcode (and partly pre-renders) websites and then sends the results to the mobile device, like Opera Mini

Opera Mini

Opera Mini is a web browser designed primarily for mobile phones, smartphones and personal digital assistants. Until version 4 it used the Java ME platform, requiring the mobile device to run Java ME applications. From version 5 it is also available as a native application for Android, iOS, Symbian...

. Such 'transcoding' is not necessarily faster (as this is extra overhead) than 'direct' browsing like most phones built-in browsers or Opera Mobile

Opera Mobile

Opera Mobile is a web browser for smartphones and PDA's developed by the Opera Software company. The first version was released in 2000 for the Psion Series 7 and netBook. Today, it is available for a variety of devices that run on Android, S60, Windows Mobile, Maemo , and MeeGo...

 does, particularly when Wi-Fi

Wi-Fi

Wi-Fi or Wifi, is a mechanism for wirelessly connecting electronic devices. A device enabled with Wi-Fi, such as a personal computer, video game console, smartphone, or digital audio player, can connect to the Internet via a wireless network access point. An access point has a range of about 20...

, UMTS or HSDPA is used as data transfer medium. It supports Javascript as long as no interactive actions are used like popup menus or timed events. It features a preview based history, tabbed browsing (up to 3-4 pages open at a time), a list of all visited pages like desktop browsers and a nice bookmarking capability. Moreover it uses an AppleWebkit / Linux user agent

User agent

In computing, a user agent is a client application implementing a network protocol used in communications within a client–server distributed computing system...

which allows viewing full web sites rather than limited mobile sites what other mobile browsers do.