![Reversiable handles for door](https://images-na.ssl-images-amazon.com/images/G/01/x-locale/common/grey-pixel.gif)
Easy to Install and Use
TMEZON Keyless Entry Door Lock is easy to install and use. Easy DIY installation without the need for professional help. Four AA Batteries (not included) last up to 12 months.
Check the door / frame dimensions to make sure they fit the following measurements before installation:
? The cross bore diameter (2.1" / 54mm or 1.5" / 38mm)
? Backset (2.4" / 60mm or 2.8" / 70mm)
? Diameter of the door hole (1" / 25mm). The door hole center and cross bore center should be aligned at the same horizontal level.
? Door thickness (1.4" / 35mm - 2" / 50mm)
Please read the user manual carefully before installation and use, so that the installation does not fail to use !!!