The DualShock (originally known as Dual Shock; trademarked as DUALSHOCK or DUAL SHOCK; with the PlayStation 5 version named DualSense) is a line of gamepads with vibration-feedback and analog controls developed by Sony Interactive Entertainment for the PlayStation family of systems. Introduced in November 1997, it was initially marketed as a secondary peripheral for the original PlayStation, with updated versions of the PlayStation console including the controller, Sony subsequently phased out the controller that was originally included with the console, called the PlayStation controller, as well as the Sony Dual Analog Controller. The DualShock is the best-selling gamepad of all time in terms of units sold, excluding bundled controllers. DualShock The DualShock Analog Controller (models: SCPH-1200; US models: SCPH-110U), is capable of providing vibration feedback based on onscreen actions taking place in a game (if the game supports this feature), and provides analog input through two analog sticks. Its name derives from its use of two (dual) vibration motors (shock). These motors are housed within the handles of the DualShock controller, with the left one being larger and more powerful than the one on the right, so to allow for levels of vibration that vary. The DualShock is different from the Nintendo 64's Rumble Pak in this respect as the Nintendo 64’s Rumble Pak uses only one motor. The Rumble Pak uses power from a battery for the vibration effect but all corded varieties of the DualShock use power supplied by the PlayStation. The rumble feature of the DualShock is similar to the Japanese version of the Dual Analog Controller, a feature that was removed shortly after that controller was released. The DualShock, like its predecessor the Dual Analog controller, has two analog sticks. Unlike the earlier controller, the DualShock's analog sticks feature textured rubber grips rather than the smooth plastic tips with recessed grooves found on the Dual Analog controller. Other visible differences between Dual Analog and the DualShock include the longer grips and handles and slightly larger L2/R2 buttons. The Dual Analog controller also has an additional mode accessible by pressing the "Analog" button that provides compatibility with the PlayStation Analog Joystick which results in the analog indicator light turning green instead of red being able to play on other devices; unfortunately this feature was removed from the DualShock. The DualShock, and its following designs also includes a direction pad, Start and Select button, and four face buttons