The AUTONICS MT4W-AV-4N is a 4-digit digital panel meter designed for AC voltage and frequency measurement, with a range of 0V to 500V and 0.1Hz to 9.999kHz. It features a digit height of 14.2mm and requires a panel cutout of 45mm(height) x 92mm(width). The meter operates on 100VAC to 240VAC power supply and is ROHS compliant.