Back in 2011 it was reported in Odd Gadgets that devices could read fingerprints from 6 feet (2 metres) away. No more placing a finger on a scanner, reducing the risk of sharing harmful bugs and bacteria no doubt.
In 2012 the biometric technology by the same company can "effectively scan fingerprints through photographic capture from as far as six meters.
Though the AIRprint is technically capable of a six-meter scan, according to Ange the standard distance this device works is between two and six feet. As previously reported in BiometricUpdate.com, the AIRprint uses only one finger, but enhancements are being made to meet the standard for commercial use, which is the use of four fingers."