Passive FHR technique allows MOODO to constantly tracking fetus status with heart beat. There is no concern of radiation as normal ultrasound exam has. The high efficient sound sensor and powerful processor enable the Advanced Algorithm Design to generate the most accurate data. Current medical system and therapy suggest more frequent exam schedule for these high risk pregnants. However, they still can not be tracked and protected at all times. Mood as the professional health provider offers the 24/7 tracking and hospital support if identifies any risk signal. Our latest tracking technologies are compressed in the core metal unibody to give our customers the confidence to our technology. The rubber cover creates the nature sound cavity to boost the signal and protects the metal core. The material of the rubber cover makes users feel very comfortable when sticking to the body. Multilayer Package can keep the product stay compacted, and show the product and its accessories to users in the right assembling order.