Safety 1st Gentle Read Rectal Thermometer Review by Thermometer Guide · At a Glance Overview : User Rating : Category : Rectal Model : TH035 Size : 0.8 x 3.6 x 7.6″ Weight 0.8 ounces Batteries : Read More on Amazon The Safety 1st gentle read rectal thermometer features a secure grip and takes a fast, accurate reading in just 8 seconds. Features : 8-second reading Flexible tip and over-insertion guard Recalls last reading Replaceable long-life battery It does read in both Fahrenheit and Celsius Pros : Good basic thermometer Cons : There are many complains about battery was dead on arrival. Final Rating : 86