CS-489H1 4.2A Dual USB chargeur de voiture couleur écran Volt Meterr Batterie Détection de tension
I just bought this product, and I'm happy with the results. The voltmeter appeared to be punctual, we've tested it with another more professional one and it was pretty much the same number that came up! Besides that before you buy it you should know that the LEDs aren't that bright(in sunlight you can hardly see it) andit doesn't have a bottom surface, so keep that in mind!