Yeah, do not use unattended. Just read this review at Amazon for evidently the same but rebranded device:
Jay B. Cutts
1.0 out of 5 stars Fire danger
Reviewed in the United States on November 2, 2019
Verified Purchase
This worked great for about 6 months or so. Then one day we smelled something burning. The unit was melting at the plug. If we had not been home, this could have been dangerous. The company replaced the unit for free, saying that sometimes a connection gets loosened in shipping and can short out. The new unit lasted about three weeks and then also melted at the plug.
I'm not going to try another one, as the risk of a fire is too great.
144 people found this helpful
I have a Kill-a-Watt since at least 2008, "P3" MODEL P4400. I have yet to compare these. The instructions for this "Power Meter" are pretty badly done. I've seen a lot worse, but these are bad. I scanned them, ran OCR and edited the text as well as I could and yesterday made 4 copies in what to me looks like comprehensible English, context, syntax, grammar, etc.
Edit: Here's the result of my edits to the OCR of the instructions...
Power Meter - Instruction Manual
Power Meter is a monitoring and testing instrument which determines the power consumption of a connected appliance and the cost of the electricity consumed.
Installing the batteries
Built-in 3.6V rechargeable Batteries (Nl-MH). The purpose is to store the total electricity and memory settings.
Resetting
If an abnormal display appears or the buttons produce no response, the instrument must be reset. To do this, press the RESET button. [drm: This appears to be a tiny hole you poke]
Display Mode
Entire LCD can be displayed for about 1 minute and then it automatically goes to Mode 1. To change from one mode to the next, press the FUNCTION button.
Mode 1: Time/Watt/Cost Display
Display duration (how long) this device is connected to power source.
LCD on first line shows 0:00 with first two figures meaning minutes (2 figures will occur after 10min) and the rest show seconds. After 60mins, it displays 0:00 again with first two numbers signifying hours (2 figures will occur at 10 hours) and the rest show minutes. The rest can be done in the same manner which means after 24 hours, it will re-calculate. LCD on second line displays current power which ranges from 0.0Watts - 9999 Watts. LCD on third line displays the current electricity costs which range from 0.0 cost - 9999 cost. It will stay on 0.00 cost before setting rate without other figures.
Mode 2: Time/Cumulative electrical quantity Display
Display duration (how long) this device is connected to power source.
LCD on first line shows 0:00 with first two figures signifying minutes (2 figures will occur at 10 minute mark), subsequent figures are seconds. After 60mins, it displays 0:00 again with first two figures signifying hour (2 figures will appear at 10 hours) and subsequent figures signify minutes. The rest can be done in the same manner which means after 24 hours, it will re-calculate. LCD on second line displays current cumulative with range in 0.000 KWH - 9999 KWH without other figures. LCD on third line displays "DAY"—“1" will be shown on numerical part (the other three figures will be shown at carry) which means it has accumulated electrical quantity for 24 hours (one day). The rest can be done in the same manner until the maximal cumulative time of 9999 days.
Mode 3: Time/Voltage/Frequency Display
LCD on first line displays the same as Mode 1 does.
LCD on second line displays current voltage supply (V) which ranges from 0.0V-9999V. LCD on third line displays current frequency (HZ) which ranges from 0.0HZ - 9999HZ without other figures.
Mode 4: Time/Current/Power Factor Display
LCD on first line displays the same as Mode 1 does. LCD on second line displays load current which ranges from 0.000A - 9999A. LCD on third line displays current Power factor which ranges from
0.00PF-1.0PF without other figures.
Mode 5: Time/Minimum Power Display
LCD on first line displays the same as Mode 1 does.
LCD on second line displays the minimum power which ranges from 0.0W - 9999W. LCD on third line displays Character of “Lo" without other figures.
Mode 6: Time/Maximal Power Display
LCD on first line displays the same as Mode 1 does.
LCD on second line displays the maximal power which ranges from 0.0W - 9999W. LCD on third line displays Character of "Hi" without other figures.
Mode 7: Time/Price Display
LCD on first line displays the same as Mode 1 does. LCD on third line Displays the cost which ranges from 0.00COST/KWH - 99.99COST/KWH without other figures.
Overload Display:
When the power socket connects the load over 3680W, LCD on second line displays "OVERLOAD" with booming noise to warn the users (selectable choice)
Supplemental information:
1: Except “OVERLOAD" interface, LCD on first line displays time in repetition within 24 hours.
2: LCD on first line, second line or third line described in this take section according to two black lines on LCD screen. Here it is added for clarification purposes.
3: Mode 7 will directly occur while pressing down button "cost".
4:"UP"&“DOWN" have no function except in setting mode.
Setting Mode -
1. Electricity price setting
Keeping the COST button pressed for more than 3 seconds (LCD on third line display system defaults Price, e.g. 0.00COST/KWH) the rendered content begins moving up and down which means that the device has entered the setting mode. Then press FUNCTION button to change selection and press UP/DOWN to set what you want. (On pressing once, the figure after decimal point will increase or decrease accordingly. On pressing and holding, figures after decimal point will increase or decrease slowly for 2 seconds while figures change quickly when pressing for more than 2 seconds. When hold-down time reaches 10 seconds or more, the figures after decimal point will stop while the figures before decimal point begin increasing or decreasing.) After that, press FUNCTION for switching ,then press "UP" and “DOWN” button again to set value which ranges from 00.00COST/KWH - 99.99COST/KWH, After setting all above, press COST to return to Mode 7 or it will automatically return to Mode7 without any pressing after setting with data storage.
Technical specification:
Operating voltage: 120V, 6OHZ
Operating current: max 15A
Wide voltage range: 110V----130V
Timing display range: 0 seconds----9999days
Wattage display (watts): 0W----9999W
Voltage Display range: 0V----9999V
Current Display (amps): 0.000A----15.000A
Frequency Display: 0Hz----9999Hz
Minimum Wattage display range: 0W----9999W
Maximum Wattage display range: 0W----9999W
Price display range: 0.00€/KWH----99.99€/KWH
Total KWH and cost display: 0.00KWH----9999KWH 0.00€----99.99€
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