Listen up to hear your heartbeat and then calculate your pulse rate! The Learning Resources Smart Heart Pulse Monitor is super simple to use. Kids just place the monitor over their hearts and hold the button for a few seconds to hear the audio computation of heartbeats per minute. This pulse monitor helps kids reach a deeper level of understanding while using all of their senses. It"s great for lessons at home or in the classroom, supporting human body, health, and physical education. Requires 3 AAA batteries (not included). For ages 5 and up. Size: 4"L x 4"W x 2"H.