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: 
Brand: BILLFET
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)