The DPU1044NT access controller has the following key features: 1. It supports up to 8 cards, 500 temporary cards, 2 years of holidays, 15 time zones per door, and 24 sets of flow control between doors. 2. It has security group settings, configurable door statuses, anti-passback, and supports boss/manager cards that can override security settings. 3. It uses a 32-bit ARM processor, has 16MB flash memory, 512MB RAM, supports up to 10,000 card holders and 100,000 transactions.