the most advanced fingerprint module HF-EM630 Feature:It consists of optical fingerprint sensor, high performance DSPprocessor and Flash. It boasts of functions such as fingerprintenrollment, fingerprint deletion, fingerprint verification, fingerprintupload, fingerprint download.Fingerprint Capacity: 768Package Dimension: 70mm*31mm*35mmWeight: 0.4kgPower: DC 4.3V~6V