1) Do not mix old and new batteries together

2) Change batteries once every 6 months to prevent battery leakage

3) Use only alkaline batteries (Duracell, Panasonic and GP Ultra are recommended)

4) Install door closer to protect your digital lock from door slamming; warranty will be voided as a result of door slamming

5) If there is an issue with the installation, do contact directly to the dealer or the installer.