Doors can be opened using either Bluetooth or NFC technology.
For opening doors via Bluetooth:
Bluetooth Low Energy (BLE) is a wireless technology developed as an energy-efficient data transmission protocol. U-PROX IDs and readers support BLE, allowing doors to be opened both at close range and from up to 25 meters away. The data transmission is secure and encrypted.  
For opening doors via NFC:
U-PROX IDs and readers support NFC technology, allowing doors to be opened securely at close range. NFC establishes a contactless connection between the smartphone and the card reader using radio communication at approximately 2–3 cm distance. This technology is specifically designed for secure authentication and payment operations.  
The mobile application can be downloaded from the links below.
Supports 125 kHz ASK and FSK, MIFARE® Classic, MIFARE® PLUS S/SE/X/EV1 with AES encryption, DESFire® EV1/EV2/EV3 with AES encryption. Compatible with Wiegand or OSDP, configurable via mobile application. Suitable for use with Paradox ACM12 access control module (26-BIT WIEGAND).
Supports 125 kHz ASK and FSK, MIFARE® Classic, MIFARE® PLUS S/SE/X/EV1 with AES encryption, DESFire® EV1/EV2/EV3 with AES encryption. Compatible with Wiegand or OSDP, configurable via mobile application. Suitable for use with Paradox ACM12 access control module (26-BIT WIEGAND).
Supports 125 kHz ASK and FSK, MIFARE® Classic, MIFARE® PLUS S/SE/X/EV1 with AES encryption, DESFire® EV1/EV2/EV3 with AES encryption. Compatible with Wiegand, configurable via mobile application. Suitable for use with Paradox ACM12 access control module (26-BIT WIEGAND).
Supports 125 kHz ASK and FSK, MIFARE® Classic, MIFARE® PLUS S/SE/X/EV1 with AES encryption, DESFire® EV1/EV2/EV3 with AES encryption. Compatible with Wiegand or OSDP, configurable via mobile application. Suitable for use with Paradox ACM12 access control module (26-BIT WIEGAND).
Supports 125 kHz ASK and FSK, MIFARE® Classic, MIFARE® PLUS S/SE/X/EV1 with AES encryption, DESFire® EV1/EV2/EV3 with AES encryption. Compatible with Wiegand, configurable via mobile application. Suitable for use with Paradox ACM12 access control module (26-BIT WIEGAND).