Heartsine 450P AED with real time CPR rate feedback. Designed for ease of use, this AED uses easy to understand visual and voice prompts. Highest level of protection from dust and water with it's IP56 rating. 2.4 pounds. Innovative Pad-Pak, integrated battery and electrode cartridge/ 1 Adult Pad/Battery Cartridge. Lowest cost of ownership. Pad/battery has a 4 year shelf life. Unit comes with an 8 year warranty.