http://alarm.com/ ADC-AC-CARD-50H4 MIFARE DESFire EV2 Smart Access Cards 25 Packs

The http://alarm.com/ ADC‑AC‑CARD‑50H4 Smart Access Cards (25‑pack) provide high‑security access credentials designed for modern access control installations using the MIFARE DESFire EV2 platform. Each card incorporates an http://alarm.com/‑specific encryption key that ensures the credential can only be read by compatible http://alarm.com/ readers, thereby reinforcing system integrity and preventing unauthorized duplication. The cards operate at 13.56 MHz, include 4 KB of memory, and are LEAF enabled for secure interoperability within the http://alarm.com/ Smarter Access Control ecosystem. They support a read range of up to approximately 3″ (7.6 cm) and can work in harsh temperature environments from ‑50 °F to 160 °F (‑46 °C to 71 °C). Constructed from PVC + PET material, each card measures around 3.4″ × 2.1″ × 0.03″ (8.7 × 5.4 × 0.08 cm) and features either a vertical or horizontal slot punch option for easy badge reel or lanyard integration. Packaged in a bulk quantity of 25 cards, the set is ideal for commercial deployments, multi‑user systems or high‑volume credential replacements. With this pack, administrators can seamlessly integrate secure credentialing into alarm, video and access workflows managed via the http://alarm.com/ platform.