This AHA Compliant, 4-Pack of Prestan Adult Manikins-Dark Tone comes equipped with Compression Depth Clicker Feedback Devices AND Compression Rate Monitor Feedback Devices. This 4-Pack of Manikins will optimize your training program by ensuring the student's Compression Depth and Compression Rate are reached with an audible 'clicking' sound and LED indicators provided by two separate feedback devices. Additional Items Included: 50 Adult Lung Bags, an Instruction Sheet, and a nylon carrying case. Away from the classroom, instructors want their students to act confidently when faced with a cardiac emergency. We want our participants to leave class knowing they can perform quality CPR to help save the lives of people in cardiac arrest.