Ever wonder just how much electricity your indoor garden consumes? How much "juice" you pour into growing every day, week, month, or year? Now, with Hydrofarm's Kill-a-Watt electricity usage monitor environment meter you're always in the know. Choose from the Kill-a-Watt's four settings to monitor your electrical usage by day, week, month, or year. Find out just how much that holiday lighting setup really costs you, or use it as a judgment call on whether it's time to replace old equipment that becomes a drag on your finances. Easy-to-read screen and multiple display modes. For standard 115 VAC appliances only, 15 amps maximum, 125 VAC maximum.