NexPTG Standard Paint Car Coating Thickness Gauge

It's hard to switch on but when it's on it works a bit poor quality really.it lacks Zap

It a good concept using this product injunction with your mobile..it’s tells you whether its been sprayed by the manufacturer or back street garage..however this product received from this supplier in Poland conned me by sending me a dud unit that didn’t work and the app you have to down load on phone has malware freezing my iPhone.deleted the app and my phone started to work properly...now I have to fork out return postage fee...Amazon won’t help .