Linear ACT-21A MegaCode 1-Channel Key Ring Transmitter, 10-Pack, Black

Get reliable, professional-grade remote access control with the Linear ACT-21A 1-Channel Key Ring Transmitter (10-Pack). Designed for facility managers, property operators and installers, this pack delivers simple, secure gate and entry management without the overhead of complex programming. Each black transmitter ships preprogrammed in MegaCode format with more than 1,000,000 unique codes, reducing the risk of code duplication and strengthening perimeter security and monitoring. The compact fob uses a single channel at 318 MHz and is powered by two 1616 batteries for long service life, making it ideal for high-use access points. A quick-disconnect key ring streamlines distribution to staff, residents or contractors while remaining compatible with Linear receivers, controllers and supported telephone entry systems for effortless integration into your access control and surveillance setup. Whether you’re securing gated communities, commercial parking, or equipment yards, the ACT-21A 10-pack gives you scalable, cost-effective coverage. Add these dependable transmitters to your inventory to improve response times, reduce maintenance, and simplify remote access—order now to secure your site.

• Simplify secure access management with a 10-pack of compact, easy-to-carry transmitters that fit on any key ring
• Reduce duplication risk with MegaCode encryption (1,000,000+ unique codes) for robust access control and security monitoring
• Quick-disconnect key ring and single-channel operation make user provisioning and day-to-day use fast and intuitive
• Long-lasting operation powered by two 1616 batteries, minimizing maintenance and downtime for gate and entry systems
• Broad compatibility with Linear receivers and controllers ensures seamless integration into existing gate, parking and facility access systems