1、Two-Way Talk Back: built-in microphone and speaker for clear two-way audio conversations, enables you to hear your and talk to your as well. Adopt FHSS, Anti-interference and sound clarity. Long distance transmission 200-300 meters in the open field. 2、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 \u0027s room. 3、A soothing night light on the unit gently illuminates a dark night. Both the parent unit and unit allow you to turn on or off the nightlight on the unit. 4、Built-in lullabies to comfort your or help her/him fall asleep. Both the parent unit and unit allow you to play music. 5、Dual power supply mode, by-charger, or 3pcs AAA dry battery power supply (Not including). Features: Two-Way Talk Back: built-in microphone and speaker for clear two-way audio conversations, enables you to hear your and talk to your 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 's room. A soothing night light on the unit gently illuminates a dark night. Both the parent unit and unit allow you to turn on or off the nightlight on the unit. Built-in lullabies to comfort your or help her/him fall asleep. Both the parent unit and 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: <=-92dBm Transmission distance: 200-300 meters(in the open field) Operating temperature: 0℃～50℃ Power supply mode: by-charger or 3pcs AAA dry battery(Not including) Product weight: 159g Product size: 9*7*2.5cm Package weight: 417g Package size: 22*13*6cm Package list: 1*Transmitter 1*Receiver 2*Power adapter 1*User manual 1*Transmitter 1*Receiver 2*Power adapter 1*User manual