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.
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. VOX function.With 2-way talk,music and nightlight function. Specifications:  Transmission Frequency:Ism 2400-2480MHz Transmission Power:17dBm Modulation Type:FSK Power Supply:DC5V 1A Battery:3*1.5V AAA (not included) Power Consumption:70mA Operating Temperature range:-10°~+60° Storage Temperature:-40°~+70° Material:plastic Baby Unit:62*35*111mm Parent Unit:62*42*111mm (with clip) Package Size:17.3*15.6*7cm / 6.8 * 6.1*2.8in Package Weight:285g / 10oz Package List: 1*Transmitter 1*Receiver 2*Power Cable 1*User Manual (English)