This is the BLUE fetal monitor. I have another post with the pink one. Brand NEW IN BOX Fetal monitor. Comes with instruction manual. (These go for $80 on Amazon, so you're getting a great deal.) Requires 2 AA batteries to use. Uses the same technology as the handheld dopplers in your Dr's office. You do not need expensive gel to use it. Pure Aloe Vera is the same thing. If it feels like it's drying out, spritz with a little water, and it will reactivate the gel. Listen to your baby's heartbeat from the comfort of your own home! Fetal heart rate monitors provide moms with a wide range of benefits from reducing their anxiety and providing reassurance that their baby is doing well, to helping parents bond with their baby by listening to their heartbeat. FAST SHIPPING: ***Depending on the time of your purchase, I can normally ship the same day. Otherwise, I will ship the next morning.