It is for use with the Zoll AED Plus Automated External Defibrillator.The door-activated alarm alerts everyone in the area when the AED has been deployed for rescue.
Zoll Non-Rechargeable Lithium Diagnostic Battery Pack is a replacement battery intended for use with the Zoll AED Pro Defibrillator Nos. 4EGN3, 4EGN4, and 4EGN5.