Color Screen size：3.5” Automatic self-testing; Biphasic energy output; CPR metronome; CPR Coaching (Optional); Adult and Pediatric defibrillation; Extensive voice and visual prompts for the operator. Energy Sequence: 150J,150J,200J.（Adult） Power Supply: Lithium Battery, 15V, 2800mAh. Charging Time: When the battery is used less than 15 times, reach to the maximum charging energy is less than 8 seconds.