Bright Box Switches are great for users with low vision, for nighttime use, or simply to attract attention. Press the top surface to activate switch adapted toys, mouse interfaces, or communication devices. Includes AC adapter. Product Number: BBX The Bright Box lights up for visual feedback. The Light Switch has three functions: Off, On and Continuous. The Power Switch has three functions: Lo, Hi and Flash. (Includes one 9-volt battery) Dimensions: 4.25" x 2.5" x 1"; Weight: 6 oz. Adaptivation’s AC adaptor (included) can be used in place of a battery to operate the Bright Box or Bright Box Tactile. This is especially useful when the device is turned on for an extended period of time.