Vzmcov 4 in 1 Gas Detector, Rechargeable Portable 4 in 1 Gas Clip 4-Gas Monitor Meter Tester Analyzer Sound Light Shock

So much better than buying it locally. The price is amazing

Worked flawlessly, probably saved some lives. Well worth the money.

These last for about year, at which point they fail on gas detection or battery life. Overall 4 stars because the service life is commensurate to the cost. But you do have to know when to replace them! You must check calibration periodically using a four gas pressurized bottle. It can fail to detect any of the 4 gasses over time. I am an engineering manager in oil and gas and go myself and send others into facilities several times per year. Life and safety first, always!

Excelente detector

I often enter underground places and this detector has now twice alerted me of low O2. Gives me piece of mind, charge lasts a long time (I've spent an entire day underground and it had enough charge for it), it is pretty load and annoying when it goes off but hopefully you'll never have to hear it go off. Banged it up a little crawling through tight spaces but it's still going.

The meter is very easy to use turn it on and check readings. You can see oxygen level and compare to normal reading. I haven't detected any of the others but will be trying in the near future. Solid and has good clip. Like the alarms also they will get your attention visually and hearing wise.

Works. Some reason when you leave it in your car over night in the winter it reads the oxygen lower then it is. Replace usb port after 8 months. Replace battery after a year. Not type usb c like it says, it's micro usb.

I use this product every day in confined spaces never had any issues with it.

Excelente producto

I would like to contact seller for calibration certificate. Please share seller contact. Its a good gas detector. Works fine. But there's no information whatsoever about the seller.

excelente y funcional, llego rápido , aunque lo calizo el numero de serie del mismo

Se me hace fragil, pero lo cuido, los tornillos se oxidaron con el sudor

Con pocos meses ya no retiene carga