Third Millennium RX1K Access Control Reader | 13.56MHz & 125kHz | RX1K90Read 13. 56 MHz and 125 kHz Smart Cards with Ease! The RX1K access control reader is designed to be directly mounted onto a UK or EU electrical back box. It also boasts an RGB illuminated keypad, providing the added access security feature of PIN entry. This highly secure reader supports a diverse range of output formats, making it compatible with most access control systems. It features an integrated speaker, RGB LED, and audible buzzer for a