Combi-Cam E, 7910-K10, Electronic Cabinet Lock, Black Finish Long battery life  up to 10 years  lower long term maintenance cost Compact, more attractive ergonomic design provides more attractive installation Can be used for individual use or multiple users in locker mode 3 password levels  user (4#) , service (6#) and master (8#) Perfect for lockers, medical carts, data racks, cabinets, safes, gun boxes and more