The Zoll AED Plus is unique to the market in so many ways! This unit not only uses consumer batteries, but it also provides real time CPR feedback to assist the rescuer to the fullest during an emergency situation. The Zoll AED Plus comes complete with a 7 year manufacturer warranty, and electrode pads that have a 5 year shelf life! This unit is also available in fully-automatic or semi-automatic to meet the needs of any lay rescuer. The Zoll AED Plus is very resistant to dust and water particles, and provides clear verbal prompts and many helpful pictures to prompt the user in a rescue situation. The Zoll AED Plus is an economical and easy to use choice that would be perfect for any environment!