Handheld optical otoscope is a practical device for ears observation. The observation window uses glass lens with LED light, it"s used for viewing the inside of the ears. It can also be used as eye diagnostic tool after changing the head. Features： Optical lens combines with LED light, providing clear field of vision for ears observation. Powered by 2 AA batteries (not included). Easy to replace the otoscope head with the blue head for eyes diagnosis, 2 to 9mm pupil enlargement marks are engraved on the main handle. Compact size and light weight, portable handle with clip and stainless steel shell is more handy and convenient, and with great durability. 4 ear tips (4mm) in total, easy replacement for satisfying different needs, more sanitary. Comes with a plastic hard case for easy storage and convenient transport. Note： Size and color may be slightly different because of manual measurement and different light conditions, please in kind prevail. Thank you. Specifications： Color： Silver & Black Material： Stainless Steel + ABS Power Supply： 2 * AA Battery (Not Included) Otoscope Size： 175 * 55mm / 6.89 * 2.17in Ear Tip Diameter： 4mm Package Size： 18.5 * 6.5 * 3cm / 7.28 * 2.56 * 1.18in Package Weight： 104g / 3.66oz Package List： 1 * Otoscope 1 * Eye Diagnostic Head 3 * Replaceable Ear Tip 1 * Plastic Box