External battery box is a breakthrough in the market, if the battery dies without you noticing, you can open the external battery compartment to replace it, so you won't be troubled by the fact that you can't unlock small safe without the emergency key. If the red and green lights are on, this indicates that the battery has been depleted and needs to be replaced as soon as possible.

【Two Unlocking Methods】

① password + rotary button, ② emergency key + rotary button. You can set a 3-digit combination for your safe. If you forget the password or the battery is dead, you can use the hidden emergency key to open the sentry safe fireproof waterproof box. (please keep the emergency key out of the safe).

【365 Day Free Key Replacement】：