Floureon TS-838 Plug Power Meter Energy Voltage Amps LCD Display Hz Monitor Analyzer Electricity Usage Monitor, Reduce Your Energy Costs Warranty: Floureon TS-838 Electricity Usage Monitor has 12-month warranty and 100% friendly customer service. Easy to Monitor Your Electricity Bill: Electricity price setting by pressing OK, VALUE, DISPLAY and SET button Built-in Battery Backup: 2X1.5V rechargeable batteries allows meter to be moved and still visible without losing readings. Measure Various Parameters + Overload Protection Function: Power (W), Energy (kWh), Volts, Amps, Hertz, Power Factor and Maximum Power (W), Time, Days ( Your electricity bills are vitally based on kWh) Large & Clear LCD Display for Easy Reading: 1.97 x 1.69inch (50 x 43mm).