Introducing Levana"s Wireless Analog Audio Monitor. This compact audio monitor allows you to clearly hear your baby up to 300ft away. You will be able to confidently do the things you want while still ensuring your baby is safe. The parent unit has volume control options and LED noise indication lights that show up to four noise levels. Feel free to turn the volume all the way down and take comfort in knowing that if your baby makes any noise the lights will alert you. Equipped with A/C and battery power, you can choose to power your unit by plugging it into the energy efficient power adapter or take advantage of the extensive battery life and power it with AAA batteries (not included) for up to 84 hours.Both the parent and baby unit of this system come with a wall mount. Mount the baby unit to the nursery wall to keep it out of baby"s reach and mount the parent unit in a safe place. You can also attach the parent unit to your belt with the convenient clip so you hear everything your baby is doing while you move throughout your home. Monitor uses a 40MHz signal.