Features: 1Digital LCD: This power metering socket has large clear digital LCD display for easy reading and it requires two 180mAh button batteries which is shipped without batteries. 2For Energy Consumption: The power metering socket is the killer of high cost energy appliances helping you reduce energy consumption and save money. 3Multi Functions:The energy monitor socket has overload alarm power alarm cost alarm LED indicator and other alarm functions. 4Overload Protection: When the whole power exceeds the rated power of the display the LCD will display Overload accompanied by a rumbling noise to remind the user. 5Various Parameters: Power energy voltage amperes power factor cost minimum and maximum power which are ideal for energy consumption monitoring. Specification: Item Type: Watt MeterMaterial: ABSGross Weight: 196g/6.9ozProduct Size: 6.6x13.6x6cm/2.6x5.4x2.4inFrequency Display: 50HzWorking Current: Max. 15ACurrent Range: 0.005A-15APower Supply Range: 1W-1800WBattery: 2PCS Button battery L1154F 180mAh capacity of one delivered without battery Package List: 1 xWatt Meter1 x Manual