We are constantly looking to improve our products.
For the Sifely S, Sifely X, Sifely E Smart Locks,
The batch number is a 8 or 10 digit number that can be found inside the battery cover of our products.
Here are some examples for your reference.
For Sifely Y Guns Safe, the batch number will be located on the bottom of the safe.
An example of a Sifely Y Gun Safe is SVA2001210248737.