DROK Red LED Panel Display DC 0~100V 12V Car Automotive Battery Monitor Voltage Meter Gauge (0.28 inch)

good for bikes or scooter to keep an eye on battery charging system as bikes or scooters are presetted to 14 to 14.5 volts charging output to keep the battery charged, my last battery was overcharged always due to faulty regulator unit, but now I can monitor the charging voltage, if your display shows more than 14.5 or 15 on full revvving than change your regulator unit asap as your battery is gonna get damage soon, needs a little calibration with digital multimeter, anyways it good and does the work

Homework

Good product accuracy not 100%,price little bit higher side with respect to others online site's.

Good Performance. Can be used for small projects. Accuracy is good. I am using it for variable power supply display and DC battery voltage measurements. Found useful.

It's voltage range is less 0-100V.It should be 0-200V

Good product. Has 3 wires, One (RED) should be a supply between 3v to 30v , second ( Yellow) should be whatever voltage you want to measure(0v to 100v), third ( BLACK) should be ground. I attached it on my dash in car to measure the battery voltage on my maruti alto. So far so good.There was no need for calibration, it is giving correct voltage.The only con is back side is a bit too exposed, probably because they had to put calibrating screw on the back.

Good working

Nice

The component turns on and works but will not measure above 33V,I have connected positive and negative to 12v and ground but when I attach any voltage 33v or above to sense and ground it just reads 33v(even if the voltage is higher. The board was not the same as the one advertised, It has no adjustment screw on the back and so I'm assuming I was sent the wrong thing. I've tested it both with a buck converter and with a battery to read and a variable power supply for the operating voltage, both tests gave 33v as max

Accurate little display! Easy to hook up and fairly accurate out of the packaging. It was only out about 0.2v when I first hooked it up, but with a small tweak of the calibration knob on the back (flathead or philips works) it was dead accurate to my multimeter.When reading a standard 12v reference just connect the red and white wire together on positive and the black wire on ground/common.

Description a bit vague. I wanted it for a DIY battery tester. I finally figured out why AA batteries wouldn't register voltage. It required an external power source to display voltage below 9v.

used this meter to monitor the second battery voltage in my camper van. The inverter used to have a remote control which showed the battery voltage but of course it was missing.

It's pretty small but pretty neat at the same time. Love the display, but I received a blue display model instead of the red I ordered and the actual package bag indicated. It's going back as I need a red one for my truck.