Cheapest FDA APPROVED - Baby Fetal Heart Prenatal Doppler

my girlfriend and i purchased this product last friday and got it on wednesday, a day earlier then expected. my girlfriend is currently 13 weeks pregnant and we used it as soon as we got it. we were worried with all the bad reviews that we wouldnt find the heartbeat and would be disappointed with it. i must have found the heartbeat within a minute, no joke. we kinda had insight on where to look because we were at the doctors the day before and i saw where she put the ultrasound machine. it was very exciting to hear right at home, the only thing is my girlfriend's worried that were gonna hurt the baby if we use it everyday but it says in the user manual it is used the daily self checks so were gonna do more research and ask our doctor. there is a review saying its a 2.0 mhz and was wrongly advertised as being a 3.0 mhz, but mine says on the actual product it is a 3.0 mhz and the user manual says 2.0 mhz. so im not sure if they just send an old user manual or universal users manual but i think thats were the confusion comes from. overall the product looks kinda cheaply made but not bad looking and seems to works pretty good. honestly though for me just to hear it one time with just you and her its worth $70. WOULD BUY AGAINGet more detail about FDA APPROVED - Baby Fetal Heart Prenatal Doppler.