made the PS3 wireless controller feel light to players accustomed to heavier controllers such as the DualShock. Haptics developer Immersion Corporation, which had successfully sued Sony for patent infringement, expressed skepticism of Sony's rationale, with company president Victor Viegas stating in an interview, "I don't believe it's a very difficult problem to solve, and Immersion has experts that would be happy to solve that problem for them", under the condition that Sony withdraw its appeal of the patent infringement ruling. The Wii Remote, another contemporary motion controller, was able to incorporate vibration. Immersion later emphasized compatibility with motion-sensing when introducing its next-generation vibration feedback technology, TouchSense. Subsequent statements from Sony were dismissive of the arguments from Immersion, with SCEA Senior VP of Marketing Peter Dille stating, "It seems like the folks at Immersion are looking to sort of negotiate through the press and try to make their case to us … we've talked about how there's a potential for that rumble to interfere with the Sixaxis controller." However, in a press release made some eight months later, Phil Harrison, Sony's president of worldwide studios, said he didn't see a need for Sony's controllers to have rumble noting that rumble was the "last generation feature" and that he thought "motion sensitivity is [the next-generation feature]." He added that rumble and other forms of feedback would continue to be valuable for certain types of games, but that it would likely come from third-party controllers. Sony later decided to include rumble functionality in their DualShock 3 controller. Wireless technology In a change from previous PlayStation controllers, the Sixaxis features wireless connectivity based on the Bluetooth standard. However, the Sixaxis lacks a Bluetooth "discovery mode", which is normally used for connecting to Bluetooth devices wirelessly, so a wired USB connection is required to set up the Sixaxis with the appropriate Bluetooth address before a wireless connection can be made. When used with the PSP Go, a PS3 is required to set up the Sixaxis. PlayStation 3 controllers are compatible with Bluetooth-equipped Apple Macintosh computers, with no external software required. Workarounds have been created allowing the Sixaxis and DualShock 3 controllers to be used on PCs and Android devices despite this limitation, using custom software and Bluetooth drivers or in the case of Android, an app and root access. Power The Sixaxis wireless controller features an internal 3.7 V Li-ion battery, which provides up to