Luckily, we borrowed this item from someone, rather than buying it. Don't waste your money. I'm into my 3rd trimester, and I know both where to listen and what to listen for to pick up the baby's heartbeat, and I have yet to find it with this monitor. All I hear is static from the foam cover, interference from moving the monitor around, and sometimes my own stomach. Even when I know the baby is moving and active, I still can't pick up the heartbeat. Definitely NOT a recommended product.