NOTICES: 1.Mode 7 can directly occur while press down the button cost 2.Please read the numbers on the front angle of the LCD screen, not from the side view 3 .If an abnormal display appears or the buttons produce no response, the instrument must be reset. You can press the RESET button to reset it SPECIFICATIONS: Frequency Display- 60Hz Dimensions- 6.1''x2.8''x1.2'' Operating Current-Max 15A Operating Voltage-120V AC Frequency Display-0Hz~9999Hz Wide Voltage Range- 110V-130V Voltage Display Range-0V-9999V Current Display (amps)- 0.000A-15.000A Timing Display Range- 0 second~9999 days Price Display Range- 0.00COST/KWH-99.99COST/KWH PACKAGE: 1 X Power Meter 1 X User Manual Overload warning: When the power of the whole machine exceeds the rated power of the monitor, the LCD screen of the power usage monitor will display "overload" to warn the user, allowing you to use electricity safely. Various parameters: killawatt uses a built-in high-precision current sensor in the meter. Power (w), energy (kwh), voltage, amperage, power factor, cost, and min and max power are ideal for energy consumption monitoring of home appliances. Blue backlight LCD display: The household electrical analyzer adopts a digital large backlight LCD display, wide viewing angle, a large backlight LCD display that is clear in the dark, and accumulates kWh circuit memory, which is easy to read and record data. Electricity Power consumption monitoring: The power usage monitor can monitor the standby or working power consumption of all electronic devices, which appliances are the killers of high energy consumption, and help you save electricity and money. Easy To Use: To set the amount charged per kWh in your house, you should plug your electronic appliance with the meter on the wall, and then it will start calculating the amount when the appliance works