Waterproof design, gentle for babies, a 30-second electronic thermometer. - Brand: CITIZEN - Model: CT791SP - Features: Waterproof, for babies, 30-second measurement - Battery: CR2032 Thank you for viewing. Used a few times on a baby. This is an electronic thermometer with a soft tip. This is a listing for the main unit only, without the outer box. There are scratches and light stains in the last two images. I wiped it with alcohol, but please refrain from purchasing if you are concerned.