Each manufacture has a different display or feature to let you know if the AED is fully operation.  The AED performs self-tests to ensure that it is fully functional.  Here is a list of what each manufacture does to show that the AED is fully function:

Philips
Blinking green light

Defibtech
Status indicator light flashes

HeartSine
Status indicator light flashes

Medtronic
OK displayed

Zoll
Green check mark

Welch Allyn
Status indicator light

Our goal at AED-SHOP.com is to educate the public about Sudden Cardiac Arrest and how AEDs increase the survival rate. In need of an AED for your organization, CPR training for your staff, or AED replacement accessories?  Contact us today with your questions or concerns at 877-251-7467 or customerservice@aed-shop.com.