I was very disappointed when I received this product.  I thought it would be of higher quality and material.  I own a "human" otoscope and was hoping this would be similar.  After attaching the head to the handle, the head actually "rattled" and moved.  It was not a secure or a tight fit on the base handle.  I took it apart a few times and tried to adjust it, but it stayed the same.  It also came with broken, plastic ear pieces which would not attach to the light head.  I sent the entire item back and have not purchased another item yet.  If you have any experience with medical equipment, this item does not even come close to professional equipment.  I wouldn't even keep it for home use because it just seemed cheaply made.