1. Check whether thestethoscope is damaged before use to avoid misdiagnosis
2. Place the earpiece in the ear and extend theear tips to the diagnosis and listening part;
3. Sound can be heard by gently tapping the diaphragm to confirm that thestethoscope is in standby state
4. If you can't hear the vibration of the diaphragm, turn the headset 180° until you hear a click.
5.Use it in a quiet place, sitting or lying down.
6. Do not rub thestethoscope with clothes to avoid noise
