AngelSounds JPD-100Smini for monitoring fetal heart rate. - Brand: AngelSounds - Model: JPD-100S / JPD-100Smini - Accessories: Headphones, Instruction manual - Application: Fetal Doppler - Color: Pink - Function: Heartbeat monitoring I used this a few times after purchasing it on Mercari. I will also include two tennis balls as a bonus. In addition, I will include the included earphones and another pair of earphones I bought separately to record the sound on my phone. Thank you for looking.