Review on bayite Mini Digital Current Voltage Amp Meter: Accurate & High-Precision Gauge with Hall Effect Sensor Transformer (5-120V, 100A) by Paul Wall

I have just received and installed two of these so my rating is based on very limited experience with the lights. Installation was easy; just disconnected 2 wires (in my case alternator and negative battery), slide the sensor rings in place, reconnect the 6" wires and routed them to the dash of a large van (just managed to do it without going an extra inch). ; cable could be a bit longer). I connected plus (switched) and minus and attached the sensors to the dashboard with velcro; they are so small and light. The rear derailleur is easily accessible for calibration and function changes. They seem more than accurate enough for car surveillance. The volts and amps are exactly as expected when adding and removing loads up to 90A with most accessories. For example, with the ignition on (with the engine off), both sensors showed 12.6V, the alternator sensor showed zero amps, and the battery was negative. the manometer showed 0.3 A, only a negative pressure of the manometer. It's fun to drive around town, watching the sensors react to changes in load and knowing that you can trust the readings. This is a lightly used van so I plan to cover the screens with a piece of tape when I park to prevent sun damage. Overall I am very happy with this purchase.