Bought to keep an eye on my Jeep Odyssey AGM battery. I installed it today, 3-20-20. I like how compact it is and had no trouble installing the app on the device using the QR code. The chart is fine, but you can't zoom in or isolate part of the timeline. The range is 20-30 feet. OkIt records voltage over time and you don't need to be in range for it to record data for the period you are out of range. I can't find how to rename the monitor. The instructions are well translated. I'm thinking of buying another one but I'll try this one for 6 months. I'll upgrade it to 5 stars if it takes longer than a year or two and downgrade stars if it doesn't last a year or get picky.
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