DualShock

The DualShock (originally Dual Shock; trademarked as DUALSHOCK or DUAL SHOCK; later named DualSense) is a line of gamepads with vibration-feedback and analog controls developed by Sony Interactive Entertainment for the PlayStation family of systems.

DualShock
The DualShock Analog Controller (SCPH-1200), a controller capable of providing vibration feedback, was based on the onscreen actions taking place in the game (if the game supports it), as well as 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 controller, with the left one being larger and more powerful than the one on the right, so as to allow for varying levels of vibration. The DualShock differs from the Nintendo 64's Rumble Pak in this respect as the Rumble Pak only uses a single motor. The Rumble Pak uses battery power for the vibration function but all corded varieties of the DualShock use power supplied by the PlayStation. The rumble feature of the DualShock is similar to that of the first edition of the Japanese Dual Analog Controller, a feature that was removed shortly after that controller was released.

DualShock 2
The DualShock 2 Analog Controller (SCPH-10010) included with PlayStation 2's launch is almost identical externally as the previous DualShock analog controller, with a few minor cosmetic changes. It has different screw positioning and one fewer screw. A blue DualShock 2 logo was added to the top of the controller, the connector is more square than the DualShock, and both the cable and connector are black rather than grey. The standard controller is black (other colors came later), rather than grey as with the original DualShock. The analog sticks are also noticeably stiffer than on the original DualShock.

DualShock 3
Announced at the 2007 Tokyo Game Show, the DualShock 3 wireless controller (SCPH-98050/CECHZC2) is a gamepad for the PlayStation 3. It replaces the Sixaxis wireless controller originally released with earlier versions of the console. The DualShock 3 is nearly identical to the previous Sixaxis version but adds the haptic feedback – also known as force feedback – capabilities found in the DualShock and DualShock 2. Sony settled a patent infringement lawsuit with Immersion in March 2007 following a lengthy legal battle. The settlement cleared the way for incorporating the missing "rumble" feature that the Sixaxis lacked.[9]  Both the vibration function and motion-sensing capabilities of the DualShock 3 can be used simultaneously without one interfering with the other. Like the Sixaxis, it also has a USB mini-B port for charging and can also be used on a PSP Go via Bluetooth, though the controller and the PSP Go must be registered using a PS3 console.

DualShock 4
The DualShock 4 (CUH-ZCT1) is the PlayStation 4's controller. It is similar to the DualShock 3, with several new features. One new feature is a built-in two-point capacitive touch pad on the front of the controller, which can be clicked.[28]  This allows the touch pad to represent multiple buttons, as demonstrated in the PS4 version of Elite Dangerous in which the four corners of the touch pad can be mapped to a separate clickable actions.[29]  The controller supports motion detection via a three-axis gyroscope and three-axis accelerometer and vibration.[28]  It includes a non-removable,[30]  rechargeable 3.7 V, 1000 mAh lithium-ion battery, which can be charged while the system is in rest mode. It weighs 210 g (7.4 oz) and has dimensions of 162 mm × 52 mm × 98 mm (6.4 in × 2.0 in × 3.9 in).[30]  It also lacks a Sony logo on the front due to the touch pad in its place.