1. Do not place the baby unit inside the crib, nor in a spot where the baby can grab it with their hands. On the other hand, the further away you place it, the more the sound clarity decreases. Conduct tests and place the unit at the farthest point from the child, from where the device can still pick up even the lowest sounds and transmit them clearly.
2. The baby should not be able to reach the device's connection/charging cables. Ensure they do not have access to them.
3. Check if the parent unit goes out of range, runs out of battery, or is on mute or low volume while it is not in your line of sight. The out-of-range or battery replacement/recharging alert functions that many intercom systems have are useful in this regard.