The technology described herein provides a device and methods for meat storage, tenderizing, and aging in a temperature and humidity controlled environment. A portable electric cooler is disclosed having first and second sets of low pressure coils coupled to a compressor and three-way solenoid valves in order to alternate in a timed pattern the refrigerant flow in order to allow one set of low pressure coils to defrost while the other set circulates the refrigerant. The cooler includes a temperature sensor, humidity sensor, and humidity controller to monitor and control temperature and humidity levels within the refrigeration chamber. The cooler also includes a pressurized water canister, a spray nozzle, and a pulse solenoid valve. The pulse solenoid valve is configured to discharge a mist through the spray nozzle into the refrigeration chamber as required to maintain a desired humidity.