Come and Check Our Branding Solutions.This fetal heart rate monitor is compact and easy to carry and use. The OLED display is displayed in blue and yellow colors, and the readings are very clear. Digital display and curve display mode can be switched arbitrarily. Built-in speaker ensures high-fidelity, clear sound. Can be used with Gel. Also, baby oil and Olive oil are also perfect choices. Perfect for listening and recording your unborn baby's heartbeat when he is 12 weeks above. Pls check inventory and detailed info before placing your orders.