Why am I not able to hear any sound or baby crying from the Parent Unit

Please check if:

• The volume level in the Parent Unit may be set too low.
  Press the “+” button or “-” button on the side of the Parent Unit to select the desired volume level (levels 0-5).
   
• The Parent Unit and the monitoring Baby Unit may be out of range with each other. Reduce the distance between the units, but not closer than 3 feet /1 meter.