1) Fingerprint sensors: optical 2) FRR (false rejection rate): less than 3.5/1000 3) FAR (false accept rate): less than 1/100,000 4) Capacity: 56-440 prints 5) Operating temperature: -30 ~ 70°C 6) Working voltage: 5V/3V 7) May be set 4 safe grades 8) Option color: copper,golden,silver