Review on 📱 BTMETER BT-90EPD Bluetooth APP Digital Multimeter: Auto Ranging Multi-Tester with 4000 Counts Data Logging on Mobile Phone for AC/DC Voltage Current Resistance Temperature by Cory Owens

Probably the best value for money USB meter. Pros: - Auto range - USB (what an insane thing for this price range) - Auto backlight - Seems solid - Temperature sensor included - VERY accurate (tested on a couple of pricier non-USB meters I have) - Sensors included It seems to work. Cons: - The battery compartment is difficult to remove. I ended up unscrewing it, then wrapped some tape around it and removed the tape along with the compartment cover. Not a big problem once you open it and know what to do. A little more about USB: - The included app seems decent and allows you to change the refresh interval. However, it would be nice if the app had a "Snap" button that would let you take snapshots instead of just a constant stream of "On" or "Off". The list gets a bit confusing during long sessions. It appears to be a standard serial COM connection. This means you can create your own application to work with if you know how to program it. All in all, I'm impressed with this meter. However, that battery compartment was a problem!