... products 3)Low cost , valuable function...Specificationsbaby cry detector,wireless,digital,audio baby monitor,detect when the baby is crying.It is ... two AAA batteries for Receiver and Transmitter, move the switches to 1and 2 (0 on Transmitter is OFF, 1 is low sensitivity ... is low volume, 2 is high volume)2. Place the Transmitter near the baby, and place the Receiver to any locations ...