Description While Growing Cannabis it is essential to keep an eye on those electricity bills! Functions: The watt meter is a plug and play device. Plugged into the wall and then an appliance (up to 3600W draw) plugged into the meter. Instantly you will see how many watts your appliance is drawing. To measure the draw of multiple appliances from one wall socket, connect a multi-plug to the meter.  Various Parameters: Power(W), Energy (kWh), Voltage, Amps, Power Factor, Cost and Minimum & Maximum Power Simply plug the meter into the wall and then plug your appliance into the socket. Specifications: Power meter itself draws 0.5W Operating Voltage: 230V Operating Current: Max 16A Wide Voltage Range: 220V – 240V