To make the change just hit the switch button on the back of the instrument and you are done. The operational ranges of 302-604 are 20% to 99% RH for the humidity sensor and -4Â° F to 122Â° F for temperature â totally sufficient for this sort of home apparatus.
Your baby will probably be able to roll over when he's about six months or seven months, when his neck and arm muscles are strong enough. Some babies manage to roll over as early as three months, but other babies take longer than seven months.
How babies learn to roll over. At about 3 months, when placed on his stomach, your baby will lift his head and shoulders high, using his arms for support. This mini-pushup helps him strengthen the muscles he'll use to roll over. He'll amaze you (and himself!) the first time he flips over.