Double stethoscope (three colors)

https://youtu.be/0PIvRTpO9B4 In addition to the textbooks that are suitable for classroom teaching; it is a scientific helper to increase the interest in daily life. Placing a stethoscope in a pet or surrounding objects not only increases the interest of everyday life, but also stimulates curiosity to explore the world. https://5993.cyberbiz.tw/s/files/5993/ckeditor/pictures/content_c5b8cc57-6c31-47ab-b0da-bd4d99b32d01.jpg https://5993.cyberbiz.tw/s/files/5993/ckeditor/pictures/content_fcf3368d-46e4-4203-a3a2-f37ef8d7b603.jpg The most precious sound secrets are no longer exclusive, and the two explore the world together! Together, I found the little secrets of the baby and the baby in the womb. https://5993.cyberbiz.tw/s/files/5993/ckeditor/pictures/content_e72e92ab-ff7c-4109-9773-11d292cc7988.jpg https://5993.cyberbiz.tw/s/files/5993/ckeditor/pictures/content_d86bd730-16ea-41f6-a7d0-1d279c3b677a.jpg https://5993.cyberbiz.tw/s/files/5993/ckeditor/pictures/content_73f1cb89-82e0-41bf-ad25-9ce10be6890b.jpg The whole set of stethoscopes is based on the best acoustic design, with good sound transmission characteristics, luxurious appearance and three colors to choose from. At the same time, two users can listen to the same object, which is suitable for use in various situations. The stethoscope was created in 1816 by the French doctor Laennec and was published in 1819. The stethoscope is mainly composed of copper, rubber tube, spring piece and head. The stethoscope is divided into "single stethoscope", "double stethoscope", "three-purpose stethoscope", "vertical stethoscope" and "multi-purpose stethoscope". Used to auscultate different conditions in different environments. The stethoscope has a clock face and a membrane surface mode that can be switched, holding the head in one hand and holding the side metal tube 180 degrees in the other hand, and there will be a click when positioning. The orientation of the cannula can also be seen from the inside of the clock face. The clock face can be used to listen to low frequency sounds, and the film surface is used to listen to high frequency sounds. https://5993.cyberbiz.tw/s/files/5993/ckeditor/pictures/content_5f78fd7f-9a25-479e-ba9f-def235384d24.jpg The whole series has three colors: yellow, red and black. Please note the color in the order. https://5993.cyberbiz.tw/s/files/5993/ckeditor/pictures/content_08ee877e-9001-412b-ae9f-6a06a19bc5f5.jpg This product is not recommended for use as a children's toy. Children must be accompanied by an adult. Please read the instruction manual carefully. Product specifications: ► Packing box: 29.5 x 13.3 x 4 cm ► Key ring body: total length is about 130 cm ► Material: PVC, aluminum ► Manufacturing location: China Precautions: ► Non-children's toys, children must be accompanied by an adult. ► Special warning: Improper use will cause hearing loss, please avoid the following behavior: ● Before using, pay attention to the volume of the target. ● Do not tap the head during use. ► When not using this product, please do not put it in your ear to avoid loud noise caused by head collision. ► Please don’t talk or yell directly at the head ► Do not place in animal ears