Biometric fingerprint reader with proximity reader MIFARE® DESFIRE®, allowing in this case access with the combination of both technologies. This reader allows you to read both the CSN (Chip Serial Number) of the card and read-write data in its memory. Bluetooth: Bluetooth Low Energy (BLE) v5.0. Access to such data can be through a cryptographic key for a more secure transaction of information (Access Grade 4). It can include a 12-key keypad that allows double factor identification with card and code. Biometric sensor with STM32L4. The reading is done through an optical sensor with a resolution of 500 dpi. The reading surface is 15x22mm. The reader can store up to 2 fingerprints per user and can be supplied (1: n operation) with capacity for 3,000 or 5,000 users.