Three-step defibrillation process Two-button operation Extensive voice and visual prompts for the operator Biphasic energy output Lock-out protection to prevent inadvertent defibrillation Device has an internal memory(60 hours) ECG signals and events can be transferred to the computer. Standard: AED Pad ................... 1Pcs Battery ...........................1Pcs AED Case ..................... 1Pcs Cleaning Cloth ..............1Pcs Options: AED Pad for Child AED Cabinet