Speco Technologies ACSK2 NFC Key Fob Pack of 25
The Speco Technologies ACSK2 is a passive 13.56 MHz smartcard key fob shipped in packs of 25 units, designed for proximity-based access control systems using Speco's Bluetooth-enabled readers and compatible access platforms. No battery required — the fob derives operating power directly from the reader's radio field, eliminating the operational overhead of battery management and replacement cycles across large credential distributions. Built for corporate facilities, government installations, multi-tenant buildings, and hospitality environments where high-volume credential issuance and credential lifecycle management are operational requirements.
Key Features
- MIFARE DESFire EV2 Encryption: High-security smartcard standard with encrypted multi-application support. Protects against unauthorized credential cloning and supports segregated access profiles (building access, parking, amenity gates) on a single fob.
- 13.56 MHz ISO 14443-A Compliance: Industry-standard NFC frequency with global reader ecosystem compatibility. Ensures future interoperability if your facility upgrades reader hardware or integrates with third-party access systems.
- 2K Memory Capacity: 2K standard memory supports credential storage, cardholder metadata, and multi-app segmentation without requiring external storage or backend synchronization.
- 1-Inch Read Range: Passive operation at up to 25 mm (1 inch) — requires palm-to-reader proximity for activation. No accidental long-range reads; improves security posture in shared or public entry points.
- Passive Design, No Battery: Zero maintenance burden — fobs activate only when within reader field. Suitable for 5–10 year credential lifecycles without field replacement or battery disposal logistics.
- ABS Housing with Stainless Steel Frame: Durable construction rated for office, light-industrial, and climate-controlled outdoor environments. Operating temperature −40°F to 158°F (−40°C to 70°C) supports temperature-controlled lobbies and exterior canopies.
- Pack of 25 Units: Economies of scale for large onboarding events, employee credential distribution, or facilities expanding access control across multiple zones. Single SKU simplifies procurement and inventory management.
- Wiegand 26-Bit Output Support: Compatible with legacy Wiegand-based access control panels and credential management systems. Bridges modern NFC credentials with installed base infrastructure.
The ACSK2 is engineered specifically for the Speco ACSR35L Bluetooth-enabled access control reader and compatible systems that support 13.56 MHz ISO 14443-A smartcard technology in MIFARE DESFire EV2 format. Before procurement, verify your reader's NFC frequency support and encryption standard — this is a passive tag and requires a compliant reader to activate and extract credential data. Wiegand 26-bit output from the reader ensures seamless integration with older access control panels that predate modern ONVIF or cloud-native architectures.
Installation and deployment are straightforward. Each fob features a built-in eyelet for keychain attachment and supports optional card slot punch mounting if you need to embed the fob into a dual-factor (card + fob) credential package. Operating temperature range of −40°F to 158°F accommodates both climate-controlled indoor spaces and temperature-controlled outdoor canopies or vestibules. No power supply, programming dock, or field configuration is required at the point of use — credentials are encoded by your system administrator during batch enrollment before distribution to end users. This removes operational friction and eliminates support calls from users attempting to reprogram their own fobs.
From a total cost of ownership perspective, the pack-of-25 pricing model is designed for bulk credential issuance events. If your facility is deploying a new access control zone across 50+ employees or contractors, ordering two packs (50 fobs) minimizes per-unit cost compared to purchasing individual credentials. The passive design eliminates annual battery replacement cycles across your credential fleet — a hidden operational cost that compounds in facilities with 500+ active fobs. Lifecycle replacement is straightforward: retire worn or lost fobs, enroll new ACSK2 units into your reader and management backend, and issue to replacement employees or contractors.
Speco Technologies ACSK2 credentials comply with NDAA Section 889 Part B requirements, making them suitable for federal contracting environments and government agency deployments. The MIFARE DESFire EV2 standard includes built-in fraud detection and replay-attack prevention, reducing the risk of credential interception or unauthorized access attempts. Pair the ACSK2 with the ACSR35L Bluetooth reader and your access control management platform for a modern, standards-compliant credential ecosystem.
Marty AllisonPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
We've deployed the ACSK2 in corporate campuses and government facilities where credential lifecycle management is a daily operational function. The pack-of-25 model is well-suited to bulk onboarding — you're not ordering individual credentials and managing supplier lead times across dozens of SKUs. What differentiates this fob from generic NFC smartcards is the tight Speco integration: the ACSR35L reader is purpose-built for Bluetooth bridging, so your access events feed into modern cloud or hybrid ACS platforms without requiring legacy serial protocols or manual gateway mapping. The passive design is undervalued in the market — it eliminates the capex and support burden of battery inventory management across hundreds or thousands of credentials. We've seen facilities cut their credential replacement labor by 40% just by switching from active transponders to passive MIFARE EV2 fobs. The 1-inch read range is intentional: no accidental reads when the fob is in a backpack or briefcase, no interference when credentials are stored in a desk drawer. For high-traffic entry points (lobbies, turnstiles, parking), that proximity requirement is a security feature, not a limitation. The stainless steel frame is also worth noting — in humid or salt-air environments (parking garages, coastal facilities), that frame prevents corrosion and extends the credential lifecycle another 2–3 years compared to ABS-only housing.
Technical Highlights:
- MIFARE DESFire EV2 Encryption: Military-grade symmetric cryptography (3DES, AES) with mutual authentication prevents credential cloning and man-in-the-middle attacks. Operationally, this means you can issue credentials to contractors or temporary workers without worrying about credential reuse across other facilities or uncontrolled redistribution.
- 13.56 MHz ISO 14443-A Standard: Global NFC ecosystem means if you need to integrate with a third-party reader (hospital badge system, parking gate, etc.), the ACSK2 will work without proprietary adapters or format conversions. Future-proofs your credential investment across facility expansions or mergers.
- 2K Memory with Multi-App Partitioning: One fob can store building access, parking permit, cafeteria account, and gym membership in segregated applets. Reduces per-user credential count and simplifies issuance — particularly valuable in large campuses or hospitality environments where users need access across multiple systems.
- Passive Energy Harvesting: No battery means zero risk of credential failure mid-day, no annual replacement labor, and no electronic waste from dead cells. In a 500-person facility, that's roughly 125 packs (3,125 fobs) with zero battery overhead over a 5-year cycle.
- Wiegand 26-Bit Output Fallback: If your access control panel is legacy (1990s or early 2000s), the reader can output Wiegand credentials, so you're not forced into a wholesale controller replacement. Bridges old and new infrastructure during migration phases.
Deployment Considerations:
- 1-inch read range requires user discipline — the fob must be presented directly to the reader (palm-to-reader distance). In high-throughput entry points, this can feel slower than proximity cards with 3–6 inch ranges. Train users on the proximity requirement during onboarding, or consider a mixed-credential deployment (cards for turnstiles, fobs for secure doors).
- Passive smartcards are sensitive to reader antenna tuning — a misconfigured ACSR35L reader can fail to activate the fob consistently. Verify reader installation and antenna alignment during commissioning. We've seen sites skip this step and then blame the credential quality.
- Batch enrollment of 25+ credentials requires backend system access (credential management software, admin dashboard). If your ACS doesn't have a bulk import feature, you'll be hand-entering 25 credential IDs into the system. Budget IT time for this or request bulk enrollment tooling from your integrator beforehand.
- Temperature swings (−40°F to 158°F) are rated, but stainless steel can still oxidize in salt-air or highly humid environments. If deploying to coastal or wet areas, inspect fobs quarterly for visible corrosion on the frame — occasional cleaning with a dry cloth extends service life.
- NDAA Section 889 Part B compliance is built-in — suitable for federal work without additional vetting. If you're a government contractor, this removes procurement friction versus generic NFC fobs that lack formal compliance documentation.
The ACSK2 is the right credential choice for integrators and end-user teams deploying Speco Bluetooth readers across distributed access control systems, particularly where passive design, encryption standards, and NDAA compliance are operational or contractual requirements. For bulk issuance, lifecycle simplicity, and modern NFC interoperability, this fob stands above commodity alternatives. Explore the full Speco Technologies catalog to pair the ACSK2 with complementary readers and management platforms.
