2.4GHz digital wireless transmission, stable transmission signal.Built-in MIC and speaker for two-way audio monitoring.High sensitivity, the crying voice is easy to be heard and the lamp will turn on to inform parents.Easy pairing, plug and play in.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 1.2V AA battery(Batterise is not included) .Volume adjustmentTwo-way intercom, support for data encryptionBoth the receiver have built-in microphones and speakersOpen space transmission range up to 250MPlug Type: EU Plug, it applies to Indonesia, Germany, France, Spain, Italy and so on.Colour: WhiteMaterial: plasticPackage Contents:1 Set x Baby MonitorNote:Please take out the battery or plugs when you do not use it for a long time.Please do not use external supply when you use ordinary AA batteries,in case any danger.Rechargeable batteries can only be 1.2V AA Ni-MH battery,please do not charge the battery in case reducing battery life when you do not use it for a long time.Please do not operate in high temperature and high magnetic fieldOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.