Electronic door lock designed for standard door installation. Specifications on the box indicate it fits door thickness from 1-3/8" to 2" (35mm to 50mm), backset of 2-3/8" or 2-3/4" (60mm or 70mm), and standard cross bore/edge bore door preparation. Powered by AA (1.5V) alkaline batteries (not included), with an operating temperature range of -4°F to 129°F and humidity up to 90%. Estimated retail value: $30.00–$90.00.