As recommended by the updated 2015 CPR Guidelines, Prestan has taken its innovative and patented CPR Rate Monitor to the next level of quality feedback. When students are practicing CPR compressions on a Prestan Professional Adult Manikin, not only will they see when they have reached and are maintaining the minimum recommended speed of 100 cpm, they will also see when they reach the upper limit of 120 cpm - the yellow monitor light will flash rapidly to let them know! It's easy to install this feedback device into Prestan Professional Series adult CPR manikins. The only tools needed are a flat head screwdriver and a philips head screwdriver. Check out the installation instructions in the downloads below.