The 12V DC Marine Voltmeter is a practical and essential tool for monitoring the voltage of your marine electrical system. With a 12 Volt DC input and 5-15 Volt DC output, this voltmeter fits most makes and models, making it a versatile and convenient option for boat owners. Its compact size and easy installation make it a must-have for any marine electrical system, providing peace of mind and ensuring the safety and efficiency of your boat's electrical components.