MATERIAL: The automotive relay tester made of plastic and metal material, solid and practical, durable for a long time.
FUNCTION: Through the continuous automobile battery (11V-15V) to the relay coil, the detector can properly check the relay contact function.
VOLTAGE: The car battery must be a 12V battery, and the voltage of the battery is among 11V--15V. Ideal for coil resistance above 20 Ohms.
LED INDICATION LIGHTS: If the relay is abnormal the red LED will light, it's normal the green LED will light.
EASY TO USE: Small size which is convenient to carry. Easy to operate. Durable in use.