Practical and easy to use thermo distance is ideal to measure temperature on distance also when your baby is asleep you can comfortably measure your babys temperature also when asleep within the crib features night function allows you to take the temperature with just one hand while the baby is sleeping without waking him up no beeps or acoustic alarm and the display is backlit for night vision proximity light beeps and flashes when positioned correctly up to 4 6cm of distance fever check