The only Cannon Safe model that comes with a built-in power supply is the Cannon 1965 premium model. However, all Cannon Safes come with knockouts in the back to allow for the wiring of electrical systems to use with lights or dehumidifiers. When using the knockouts be careful not to make them any bigger. This can void your warranty and compromise the integrity of the safe. We also have cordless dehumidifiers and light kits available.