OMG It's brilliant though I couldnt find babes Hb just mine at first....It says you will hear it earlier with a full bladder I had held off peeing all morning in the hope that it would arrive so I had a quick try nope couldnt hear it.......then I had to go to the loo......empty bladder walla heard babes HB straight away...sounds like a horse gallopping in there lol...I am over the moon I love it xx