Feature:1. 2.4GHz digital wireless transmission, with stable transmission signal and longdistance transmission, up to 200300 meters of empty place.2. Builtin MIC and speaker, used for 2 way audio listening monitoring and the tone quality is clear.3. Support 2 way voice, mother can directly hear when baby make sound, mother needs to press the button to speak.4. The volume can be adjusted, mother can control the baby's music, night light and volume.5. With a song in it, mother can press the button to play this song to help baby sleep faster.Specification:Condition: 100% Brand NewItem Type: Audio Baby MonitorMaterial: ABS plasticTransmission Frequency: ISM 905-925mhzTransmission Power: 10dBmModulation Type: FSKModulation Frequency: 180KHzReception Sensitivity: -92dBmPower Supply: DC5V USB or 3pcs AAA batteries (Not Included)Operating Current of Transmitter: Maximum 180mATransmitter Standby Current: Maximum 75mAOperating Temperature Range: 0-50Storage Temperature: -40-70.Package List:1 x Transmitter1 x Receiver1 x Description2 x Power Supply