IZTOSS Digital Voltmeter 12V 24V Battery Voltage Meter with Low Voltage Beep Alarm Waterproof Design and Colorful LED Digital Display for Boat, Car, Motorcycle, Truck, RV Accurate Voltage Monitoring

High quality build, easy to install. Works as advertised.

Today is Jan 5th, 2024, and I bought this voltmeter back on July 7, 2022, mainly for the low voltage alarm and I have not been disappointed. Cut to the chase, it works like it should. The digital meter itself may not be as accurate as a Fluke meter but if works for what I need it for. The reason for the purchase was because I do a lot of night driving and my alternator went out in my car, but I didn't know until my headlights became very dim. So dim, I had to turn them off and attempt to drive home using a flashlight. But I didn't make it. Now if I had this voltmeter back then, I would have known a lot earlier that I had a problem and possibly could have saved myself a lot of hassle. I would highly recommend this voltmeter to anyone needing one and I will buy again.

Does right what you need it to, display is clear and nice

Works great! Love the brightness but could be distracting for some if it's up to high on the dash. Doesn't bother me at all. The housing was a tad big for the old 12v outlet hole in my xterra but a little sanding helped it slide right in. The nut provided holds it in real tight. For me this is a vital guage for any vehicle with alot of lights, big stereo, aftermarket electric fans or outings where you need to monitor your ticket back home. I look forward to buying more from this company. Great stuff!

I installed this on my ham radio go-box and it is a really nice meter. The display is easy to see and the "fuel gauge" meter around the perimeter is a nice visual indicator of how much juice is left in the battery. It is easy to install using a typical 1 3/8 inch hole saw for the mounting hole (same size as other similar round panel mount items). This will probably become my go-to meter for 12v DC applications.

Have this installed in my toy hauler to monitor batteries as it's set up to go off grid. Three years now and it's still working. I have an expensive Victron battery monitor hooked up inside a cabinet for battery usage but this gives me voltage at a glance. They always match. No complaints at all.

If you are buying this so that you hear an alarm before your battery is too low to start your car, be aware that you likely will not. Alarm starts when battery is discharged too far.

A little hard to see numerical readout in sunlight but the led range display is always visible, and actually better to glance at going down the road. I would buy this again.

丸物なので、限られたスペースに他の物と組み合わせるには不向きですね。サイズは表面Φ３７とネジ部Φ２８、高さ30mm（端子込40mm）です。全てノギス測定・端数切上げ。他の電圧計（所有デジボル含む）よりも0.2Ｖ高く表示されます。調整できません。その前にバラせません。バラすものなら破損覚悟です。Amazon発送だったせいか？私のものは2日で届きました。

注文してから受け取るまで、約3週間かかりました。輸送時についたと思われる傷がディスプレーに有り、総プラスティック製で質感もあまり良くありません。ディスプレーは華やかで、案外見やすいです。

電圧の数字は正確ではありません。昼間は文字はほとんど見えません、、

周りのデンキだけ、点いて、デジタル表示しませんでした。時間の無駄でした

他のレビュアの方も書かれていますが、写真からは想像できないほど見た目がチープで、汚れらしきものも見られ、正直新品なのかと疑ってしまうレベル。一応動作はしているようです（屋内で12VのACに接続して動作チェックしただけ）。また、配送に係るショップの対応にも難があり、到着予定期間の翌日になってようやく日本国内の交換所を通過するという対応（元々予定日までに到着させるつもりが無かったとしか思えない）。購入される際は、記載されている到着予定期間は目安以下だと考えて、予定通り着かないものだと思っていた方が振り回されずに済むかと思います。私がもし同等品を購入する必要に再度迫られた際は、こちらの商品を選ぶことは限りなく無いでしょうが。