<p><strong>Description:</strong></p> <ul> <li>12/24V</li> <li>5-15V</li> <li>Temp Range 30-120°C</li> <li>11.3-11.9V RED (Battery must be charged)</li> <li>12-12.5V YELLOW (Normal when car is off)</li> <li>12.6-15V GREEN (Normal when engine running)</li> </ul>