DKS 1815-247 Wiegand IDTeck Reader combines a 26-bit Wiegand keypad and IDTeck RF 20. The keypad and card reader operate independently, and the combination is designed for indoor use to control access to secure areas that require digital code entry. Most readers operate on 5-12VDC. Note: Not designed for stand-alone operation and must be connected to an access controller. Advanced Features: Physical contact not required, proximity cards can transmit data through common building materials except metal, and is maintenance-free, no parts to wear out or adjust.