CPRTrakr attaches to your key ring and is easily accessible for rescuers to provide correct CPR timing for compressions. CPRTrakr works in conjunction with Hands-Only CPR, providing a continuous beeping sound and LED light indicator at a rate of 110 beeps per minute with a volume of 90-100dB. CPRTrakr can also act as a beacon for arriving rescuers to find the general location of the emergency as they enter the scene. If someone near you collapses and is in cardiac arrest, begin with the basic 4 steps: 1. Check for safety 2. Check for responsiveness 3. Call 911 and an tell someone to get an AED 4. Check for breathing for approximately 10 seconds If no breathing, begin CPR. Place CPRTrakr near patient: 1. Push the button once on CPRTrakr to start beeping sound indicator. 2. LED light indicator will flash at same rate of beeping sound indicator. 3. Begin and continue chest compressions following beeping sound and LED light indicator until an AED and/or help arrives. 4. Push button again on CPRTrakr to stop beeping sound indicator and stop LED light indicator.