Features:

One-way monitoring: Parent can listen to baby 

Long-distance: Wide range, can be used between 1-4 floors 

Night light: Parent can open the night light for the baby. 

Built-in battery in parent unit: Rechargeable battery for 3-4 hours, which can be used continuously for about 10 hours 

Ultra-low radiation: Radiation is LOW that it can be ignored 

Indicator: When baby cry, the light on parent unit will flash to remind you