Twiddler

The first Twiddler was launched in 1992 by the HandyKey Corporation.^[2] HandyKey was purchased in 2007 by the Canadian firm Tek Gear.^[3]

The original Twiddler used a serial port for communication and a PC AT keyboard port for power.^[4] This was replaced with USB for the Twiddler 2.^[5] The third generation Twiddler, the Twiddler 3, natively communicates using USB or Bluetooth and provides haptic feedback through an optionally installed module.^[6] The fourth generation, the Twiddler 4, announced in 2024, will use USB-C or Bluetooth, and replaces the Twiddler 3's joystick with an optical trackpad.^[7]