Yale YRL226-NR-605 Polished Brass US3 Real Living Assure Lock Key Free Touchscreen Lever Lock With Key Override, for use on all standard interior and exterior doors, with an adjustable 2-3/8" to 2-3/4" inch backset. Meet the Assure Lever, a new lever lock designed for single-hole doors (doors without a deadbolt) from side entries, garages basements, interior rooms and more. The Assure Levers can be used as standalone keypad locks, or as smart locks that can be fully integrated into a smart home or alarm system with the addition of a Connected by August, Z-Wave Plus or Yale Smart Module. The standalone version can be upgraded with any Yale Smart Module at any time. This lock provides entry access by a 4 to 8 digit pin code, or with a key, and it stores upto 25 diferent access codes. Using Z-Wave wiresless (need to purchase CBA KIT which is sold separately), this lock has many more options and can store up to 250 unique user passwords. After a successful code entry the unit unlocks, and it will automatically relock after thirty seconds. If 5 unsuccessful attempts at entering a valid PIN code occurs, the unit will shut down and will not allow operation. The touchscreen is tri-lingual in English, Spanish, and French. This Lock uses 4 "AA" Alkaline batteries, when battery power is low, a warning indicator will flash red, if the battery is completely dead, use the cylinder key override.