If you work with student athletes, law enforcement, or are involved with any other outdoor activities such as operating a golf course, you will want to make sure your AED is up for the challenge. You can plan on your AED seeing some abuse when being toted around outside, and you will want it to last. The Zoll AED Plus has one of the highest IP ratings when compared to similar AED devices available, which means you really can’t find a better device for your use. Carrying a rating of IP55 means that it scores very well for dust and water protection. IP stands for ingress protection, and the first number represents its score for dust protection (5 out of a possible 6). The second number represents its protection from water (5 out of a possible 8). This Zoll Defibrillator can stand up to quite a bit of abuse when compared to the average portable AED device.