Our Paxton 690-222 Net2 Hands-Free Keyfobs are designed to work seamlessly with the NET2 system. These fobs are classified as hands-free, which means that they don't require physical contact with the reader for access. They work with P and KP readers that have a hands-free interface, as well as long-range readers.Features:Read range of 0.85m to 2.5mBattery life of 3 yearsOperates at a frequency of 125KHZ