VeriChip received United States FDA approval in 2002. About twice the size of a grain of rice, the device is typically implanted above the triceps area of an individuals right arm. Once scanned at the proper frequency, the VeriChip responds with a unique 16-digit number which can correlate the user to information stored on a database for identity verification, medical records access and other uses. The insertion procedure is performed under local anesthetic and once inserted, is invisible to the naked eye. On February 10th, 2006, a surveillance company in Cincinnati became the first American business to use the VeriChip for access to its datacenter.