This is a revolutionary ignitor and glo-plug tester. The E/Z Glo will not only effectively ignite your models glo-plug, but will also test it and report its condition with an audible beep. Simply connect the E/Z Glo to your glo-plug, press the test button and listen for the beep. If you hear a beep, the plug is good. If there is no beep, the plug is bad. The E/Z Glo comes with a 1700 mAh battery & charger.