# Rhombus Secure Access Fob

Give users a High Frequency (13.56 MHz) Secure Fob with advanced authentication and encryption features.

[See Rhombus in Action](https://www.rhombus.com/live-demo/ "See Rhombus in Action")

### Secure Fob Specifications

- **Dimensions**: 40.5mm (1.59in) x 32mm (1.26in) x 5mm (0.20in)
- **Weight**: 0.166oz (4.7g)
- **Material**: ABS
- **Color**: White
- **Surface Finish**: Matte
- **Operating Temperature**: -25˚C to 85˚C (-13˚F to 185˚F)
- **IC**: MIFARE DESFire EV1
- **Protocol**: ISO/IEC 14443A
- **Operating Frequency**: 13.56MHz
- **Encryption**: 128bit AES
- **Memory**: 2KB
- **UID**: 7B
- **Data Retention**: 10 Years
- **Write Cycles**: 100,000
- **Quantity**: 50 fobs per box, keyrings included
- **Box Dimensions**: 203mm (8in) x 88.9mm (3.5in) x 63.5mm (2.5in)
- **Shipping Weight**: 0.32kg (0.7lbs)

[Download Specs](https://www.rhombus.com/files/specs/secure-fob.pdf "Download Specs")

### Explore Other Access Control Components

Build the perfect Access Control solution to suit your specific needs.

[**DR20** \ Modern, touchless, and reliable smart reader](https://www.rhombus.com/access-control/door-readers/dr20/) [Learn more](https://www.rhombus.com/access-control/door-readers/dr20/ "Learn more")

[**DR40** \ Equipped with a door reader, camera, and intercom](https://www.rhombus.com/access-control/door-readers/dr40/) [Learn more](https://www.rhombus.com/access-control/door-readers/dr40/ "Learn more")

## See Rhombus Access Control

Request a demo with our team today and see how you can transform building management in your spaces.

[Request Demo](https://www.rhombus.com/live-demo/ "Request Demo")