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: BBXTThe Bright Box Tactile has visual and tactile feedback. The visual feedback and tactile feedback (much like that of a cell phone or pager) can be employed independently of each other. The Light Switch has three functions: Off, On and Flash. The Tactile Switch has three functions: Off, On and Pulse. (Includes one 9-volt battery)Dimensions: 4.25" x 2.5" x 1"; Weight: 6 oz.Adaptivation’s AC adapter (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.