You'll use your basic scuba equipment and will need a pocket mask to practice in-water resuscitation. During exercises, you'll work with an oxygen unit, floats, marker buoys and perhaps CPR mannequins. Your PADI Instructor will explain the equipment that you need and may suggest additional gear, such as your own first aid kit, which will be useful throughout your diving career.
Check with your local dive center to get advice about everything you need for your diving adventures.