Product introduction: Fecal occult blood is blood in the stool (excrement) that cannot be clearly seen with the naked eye. Occult blood may be a symptom of gastrointestinal diseases such as ulcers, polyps, colitis, diverticulitis, fissures, hemorrhoids or cancer. Signs of these lesions are often difficult to detect in the first stages, so looking for occult blood in the stool is an important screening test that can identify the presence of lesions in the gastrointestinal system at an early stage Features: 1. Monitor fecal occult blood 2. Accuracy up to 98% Get results in 3.5 minutes 4. Easy to use. Convenient for sampling and reading results. 5. Self-test, convenient and fast Applicable people: 1. Stool with blood, black color, mucus, or rectal bleeding 2. Sudden changes in defecation habits (persistent constipation or diarrhea), changes in stool shape (strips), and continued urge to defecate after defecation 3. Unexplained weight loss 4. Lower abdominal discomfort (abdominal bloating or intestinal cramps) 5. Symptoms of anemia appear in the body: cold hands and feet, fatigue, rapid heartbeat, asthma, pale complexion, dizziness