This kit contains 8 Professional Adult CPR Manikins and 1 AED Trainer with Multi-Language Port and Metronome. The unique clamshell design of these adult training manikins helps Instructors save valuable training time by making setting up, transporting, packing up, and inserting a face shield lung bag quick and easy. A built-in clicker mechanism helps students learn to use the right amount of force to compress the chest to the correct depth, and the patented face/head tilt, which simulates the way an actual victim's head would move, helps students learn how to open the airway during CPR. The manikins also feature a built-in CPR rate monitor that lets students and instructors see at a glance when the proper rate of compressions has been reached and takes 2 AA batteries (included). Comes with adult face shield/lung bags and the trainer includes a built in metronome (rhythmic beeping sound) for students to time the correct rate of compressions while giving CPR. TRAINING DEVICE ONLY, NO SHOCK DELIVERED.