Boss CAP35 Farad Digital Hybrid Capacitor with Blue Illumination 35 Farad Digital Hybrid Capacitor with Blue Illumination 3-Digit Super bright LED voltage meter, Voltage measure accurate to +/- 0.1VDC, Blue illuminated window Warning tones for reverse polarity connection, over voltage (&gt;17VCD), or low battery voltage (&lt;10VDC) Working voltage: 16VDC Surge voltage: 20VDC ESR 35 Farad capacitor Digital voltage display and blue illumination 35 Farad capacitor Digital voltage display and blue illumination