I asked the supplier to check the voltmeter dimension for the plug of my car. The size of the blanking plug and the hole in the instrument panel are smaller than the USB voltmeter. The seller still sent the goods, even though I stated the dimensions in the order. There was only a week to complain - little time. Comments in order: "The plug has a size of 28 x 45 mm and the hole has a size of 23 x 36 mm. Thank you for control, Vladislav CZ".