Both baby and parent units come with battery compartments and micro USB connection Parent unit includes NiMH rechargeable batteries.Two-way Talk & Lullabies Playing：You could talk back to your baby to comfort him/her via talk button when he/she is crying.Lull your baby to sleep with one of 8 lullabies or comfort him/her when he/she wakes up.
Night light：You could remote control the baby night light on/off.
Vibration：Vibration and, or acoustic sound works together to draw the attention of the parents to take care of the baby.
Temperature Monitoring and Warning：The LCD screen of parent unit can indicate the temperature of the baby room in real time. Beyond the range (60.8F - 86F) there will be acoustic warning.