Features: 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.Position the transmitter at a distance of about 1.5-2.0 meters from the baby.Open space transmission range up to 250M. function. With 2-way talk , music and nightlight function.Specifications: Transmission Frequency: 2400-2480MHzTransmission Power: 17dBmModulation Type: Power Supply: DC5V 1ABattery: 3 x 1.5V AAA (not included)Power Consumption: 70mAOperating Temperature range: -10C~+60CStorage Temperature: -40C~+70Cnote: Neutral Material: plasticcolour: white bluePackage Contents: 2 x Baby Monitor intercomOnly the above package content, other products are not included.Note: Light reflection 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.