The Speco ACSC2 Clamshell Smartcard Credential is designed for Bluetooth readers and operates at a frequency of 13.56 MHz. This pack includes 25 cards, offering up to a 2.25" read range for easy access control. Equipped with advanced high-security encryption technology, these smartcards ensure your data remains protected. Additionally, they feature a sophisticated fraudulent data detection system, making them a reliable choice for secure environments. Make your access control system smarter and safer with the Speco ACSC2.