Our Bath and Room Thermometer provides fast and accurate temperature measurement to help keep baby comfortable during bath and sleep time. Uniquely designed in the iconic TT star, the thermometer is styled to fit with your nursery or bathroom decor. For baby, the optimal room temperature is approximately 18C while the optimal temperature for baby's bath is at body temperature, between 36.5C and 38C. Bath and room thermometer. Gently tap the unit to activate the display and temperature will be displayed in a few seconds. The temperature can be displayed in fahrenheit or celsius. The LED warning light on the display panel will illuminate red when the water temperature is above 39c and too hot for baby. Thermometer floats in the bath and is certified as a bath toy. The optimum temperature for baby's bath water is body temperature, between 36.5c and 38c. The tommee tippee closer to nature bath thermometer is bpa free for total reassurance. Readings in Celsius and Fahrenheit. Easy to read LCD display. Batteries required 1 x Li-Ion (included). Suitable from birth.