It works but not all the time, the LCD readings can jump around a lot making it difficult to read, for the money it is still a good purchase. I was 13 weeks pregnant with twins when I found heart beats. I will review again in a few weeks to see if it settles down as the babies grow, I would recommend this product.
I brought two of these for our preschool rooms and they do the job perfectly! Really good value & the company that sells them were a pleasure to deal with. I would definitely recommend this product & company! 6stars!