PSOne Dual Shock Controller (Playstation)

The DualShock Analog Controller, 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 64s Rumble Pak in this respect as the Rumble Pak only uses a single motor. The Rumble Pak also uses batteries to power the vibration function while all corded varieties of the DualShock use power supplied by the PlayStation. (However, some third party DualShock-compatible controllers use batteries instead of the PlayStation's power supply.) The rumble feature of the DualShock is similar to the one featured on the first edition of the Japanese Dual-Analog Controller a feature that was removed shortly after that controller was released.