Requires 4 AA batteries, purchased separately;Easily installs in minutes with just a screwdriver;Customized automatic door locking after 30 seconds for peace of mind;SmartKey re-key technology - re-key the lock yourself in seconds in 3 easy steps, Please verify user manual for Troubleshooting installation- Page No-10;Home Connect technology - communicates wirelessly to security and home automation systems via Z-Wave; Z-Wave certification number - ﾃつZC08-15060010;Please see Installation Manual and User Manual under Technical Specification section for additional information.