With the lightest weight and most compact footprint among leading AEDs, HeartSine samaritan PAD is easily transported and fit into constrained spaces. Easy-to-understand visual and voice prompts guide the rescuer through the entire resuscitation process, including CPR ― a key link in the chain of survival. One- and two-button interfaces enable simple, straightforward operation. The 350p is Heartsines standard Semiautomatic AED unit, the 360P is the Fully automatic unit, and the 450 is the high end Semiautomatic AED with CPR feedback features.