the PlayStation Eye camera, and the PlayTV DVB-T tuner/digital video recorder accessory. At Sony's E3 press conference in 2006, the then-standard wireless Sixaxis controller was announced. The controller was based on the same basic design as the PlayStation 2's DualShock 2 controller but was wireless, lacked vibration capabilities, had a built-in accelerometer (that could detect motion in three directional and three rotational axes; six in total, hence the name Sixaxis) and had a few cosmetic tweaks. At its press conference at the 2007 Tokyo Game Show, Sony announced DualShock 3 (trademarked DUALSHOCK 3), a PlayStation 3 controller with the same function and design as Sixaxis, but with vibration capability included. Hands-on accounts describe the controller as being noticeably heavier than the standard Sixaxis controller and capable of vibration forces comparable to DualShock 2. It was released in Japan on November 11, 2007; in North America on April 5, 2008; in Australia on April 24, 2008; in New Zealand on May 9, 2008; in mainland Europe on July 2, 2008, and in the United Kingdom and Ireland on July 4, 2008. During E3 2009, Sony unveiled plans to release a motion controller later to be named PlayStation Move at GDC 2010. It was released on September 15, 2010, in Europe; September 19, 2010, in North America and October 21, 2010, in Japan. On October 13, 2010, Sony announced an official surround sound system for PS3 through the official PlayStation YouTube channel. The PlayStation 3 can also use DualShock 4 controller initially via USB cable, but Firmware update 4.60 enabled wireless connection. Statistics regarding reliability According to Ars Technica, the number of PlayStation 3 consoles that have experienced failure is well within the normal failure rates in the consumer electronics industry; a 2009 study by SquareTrade, a warranty provider, found a two-year failure rate of 10% for PlayStation 3s. In September 2009, BBC's Watchdog television program aired a report investigating the issue, calling it the "yellow light of death" (YLOD). Among the consoles that experienced the failure, they found that it usually occurred 18–24 months after purchase, while the standard Sony warranty covers one year after purchase. After this time period, PlayStation 3 owners can pay Sony a fixed fee for a refurbished console. Sony claimed that, according to its statistics of returned consoles, approximately 0.5% of consoles were reported as showing the YLOD. In response to the televised report, Sony issued