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Product characteristic: electronic cylinder Additional features include: - Non-volatile Memory Storing 750 Audit Events in the lock and 1,000 in the keycap - Power supplied by the key, no hard wiring required. Powered by an easily replaceable CR2025 Battery with 20,000 cycle battery life - Fits standard RIM and Mortise Housing as well as other various platforms - Available with RFID/PROX coil insert for dual use with HID compatible systems - Keys are electronically programmed to open only specific locks during a designated schedule - Audit information recorded in both the lock and key shows a time-and-date stamped record of every event, including authorized access and unauthorized attempts - Installation instructions are included, along with two small screws. Otherwise, no accessory materials are required for installation or use.