The 0.28-Inch 3-Wire Mini Digital DC Voltmeter is an ultra-compact, high-precision voltage panel meter featuring a bright red 3-digit LED display. Thanks to its independent 3-wire design, it can accurately measure wide-ranging electrical loads from 0V to 100V DC without losing power at lower thresholds. With integrated reverse-polarity protection and an auto-adjusting decimal point, it is the perfect diagnostic panel gauge for monitoring automotive batteries, solar charging setups, DIY power supplies, and RC hobby electronics.