Smart Heart Pulse Monitor. Listen up to hear your heartbeat, then calculate your pulse rate! Simply place the easy-to-use monitor over your heart and press the button to capture and calculate the audio computation of heartbeats per minute. Hands-on multi-sensory tool helps students reach a deeper level of understanding. Great for human body and health lessons, as well as physical education. Measures 4 inchesL x 4 inchesW x 2 inchesH. Requires 3 AAA batteries, not included. Grades PreK-5. LER 6971.