Features: Two-Way Talk Back: built-in microphone and speaker for clear two-way audio conversations, enables you to hear your baby and talk to your baby as well. Adopt FHSS, Anti-interference, and sound clarity. Long-distance transmission 200-300 meters in the open field. VOX Function: under VOX mode, it automatically puts the transmitter in sleep mode to save battery. It reactivates automatically when it detects noise in the baby's room. A soothing night light on the baby unit gently illuminates a dark night. Both the parent unit and baby unit allow you to turn on or off the nightlight on the baby unit. Built-in lullabies to comfort your baby or help her/him fall asleep. Both the parent unit and baby unit allow you to play music. Dual power supply mode, by-charger, or 3pcs AAA dry battery power supply (Not including). Specifications: Material: ABS Color: White Receiver sensitivity: