The use is very simple. Just put in 12V and they show the voltagem.
The price is acceptable, because they work and safe you to get without power to turn the engine. Could be less expensive. I cut the cable of one and put direct with 12V from battery to monitor the state of sound battery (hi-power car ... Read more
This little guy is bright, consumes very little power, is large enough to read from across a room, but small enough to wedge into a small corner. The cable is rather short. It doesn't work if wired up backwards. I use this as a quick and dirty battery monitor on my off-grid batteries. It seems to disagree ... Read more
This is a pretty straight forward devce. Plug it into the cigarette lighter power plug, and it'll give you a voltage in the LED display. The accuracy isn't 100%. It's off by about 7% in my car, but as a rough gauge, it is fine enough.
The plug is a bit brittle and feels like it may break if you have ... Read more
it really look nice when the red digit light up. look pro. really simple to install. no rocket science needed. just plug and play. can't tell is it accurate or not. the housing seems fragile. hope it won't fall apart when i leave it in the vehicle in hot sunny day. could be nice it there is a choice ... Read more
Good to use and see if you car is charging your battery, i'm use in my antique car, my usual car and my motorcycle, its works with all they high brightness, very discrete, very accurate with my multimeter The cable is out by side, is better if is by back, and best if have a switch to turn on/off That ... Read more
Very compact unit with power cord approximately 12 inches in length. I've used it to measure voltage of a lithium cell just to ensure that it works out of the box and it measured the voltage accurately given that it was a single cell (3.7V). Since I have an audio system in the car and often times play ... Read more
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