Description:This 2.4GHz digital wireless transmission device is specially designed for voice monitoring your baby so that you can do your own things when baby is resting peacefully and come back to your baby's when they cry and need you. The open space transmission range up to 250 meters due to adopting the 2.4GHz digital wireless transmission.Features:Belt Clip: Clip the parent unit to your belt and take advantage of the extended range and battery-powered operation. Two Way Talk: Both the parent unit and the baby unit have built-in microphones and speakers for two-way talk, so patent can hear baby's voice and also can talk and comfort baby when he/she is crying. High sensitivity: The crying voice is easy to be heard and the lamp will turn on to inform parents. Position the transmitter at a distance of about 1.5-2.0 meters from the baby. Both parent unit and baby unit can be powered by DC 5V or 3*1.5V AAA battery. Open space transmission range up to 250M. Specifications:Color: WhiteMaterial: ABSTransmission frequency: 2400-2483MHzTransmission power: 17dBmModulation type: FSKPower consumption: 70mAPower: 3 * 1.5V AAA battery (NOT included) or DC 5VTransmission distance: Up to 250 m (Open space)Dimensions: Approx. 62 * 40 * 103mm / 2.4 * 1.6 * 4.1in (Antenna is included)Package weight: 331-357gPackage List:1 x Parent Unit1 x Baby Unit2 x Power Adapter1 x User ManualNote:2. Do not use external power supply to avoid danger when using normal AAA batteries..3. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.