Prolux Easy-Glow Features: High tech regulator application, output voltage is1.5V Switching transfer (low heat dissipation) All kinds of 3.5-20V batteries can be used including 2S & 3S LiPo and 12V lead acid batteries. With LED indicator Input reverse protection Operating Instructions:

Connect the Easy-Glow to a DC 3.5V-20V power source. Squeeze the spring-loaded clip and place it onto the glow plug. Release clip to hold. When the LED turns red, the glow ignitor is working. If the LED is off, it means the battery connection is faulty or the glow plug is burned out