TacitLanguage was based upon was an accessory for the hearing impaired to aid in their ability to sign in dark or low light situations.
For the device to be effective 24 LED's were placed in the design. Each finger has 2 small LED's attached while 4 are located around the wrist. The lights are bright enough to highlight the users face and other hand when positioned near. The device will light up when the users moves his/her hand via the use of an accelerometer.