The goal of the Guard Patch is to develop a wireless bio-signal acquisition system and platform for prevention of cardiovascular disease. The relative products include YuGuard (24-hour ECG monitoring patch), YuSound (Intelligent medical stethoscope), YuRine (Portable urine detection system and platform ), YuCloth (Smart ECG clothing), YuPet (I-Pet ECG clothing), YuBelt (ECG monitoring belt on sports), TriAnswer (Bio-signal acquisition platform). Introduced video: (https://youtu.be/xOxKiOdbVXc).