possible product performance, please read this manual in its entirety Place alarm clock in a dry area free of dirt and dust. To help xt preference.Automotive digital clock is easy to install using hook-and-loop tape; Displays hours, minutes and date; Includes battery and setting instructions. We aim to To Set the Clock: Month/Day - Press B2 once and display will flash date/time, then press B2 twice to advance month cycle by pressing B1. Press B2 a third time TO SET THE CLOCK. MONTH/DAY - Press B2 once and display will flash date/time, then press B2 twice to advance month cycle by pressing B1. Press B2 a third. 1. Scroll until the display shows Set Clock, and then press OK. · 2. Enter your master code with the numeric keys, and then press OK. · 3. Press OK again. · 4. Scroll up/down until the display shows Set Clock. · Press OK. · The display shows Enter Code. · Enter your master code with numeric keys. Press OK. · Press OK again