Both BioStar 1 and 2 supports the USB card reader DE-620 and the fingerprint enrollment reader BioMini / BioMini Plus. BioMini Combo and Slim are not supported.
- DE-620 is supported in BioStar 2 starting version 2.4
- Biomini Plus 2 is supported in BioStar 1.93 and BioStar 2.6
Any other USB readers are not supported.
You can find DE-620 specification chart in the following link