2.4GHz digital wireless transmission, with range indoor 150 square meters, and the outdoor open space is 100 meters. Please keep it within the effective range. Crystal clear 2-way communication, safe & simple & effective, allows you to soothe your baby without being in the room. This feature is also perfect for older kids and senior parents to talk back and use like a walkie talkie. Design portably, a clip attached to parent unit, carry it conveniently. Voice activation function to save power easily. FHSS, there are 32 channels to avoid interference, you can hear every little sound your baby makes. (The distance of the position of baby unit from baby is about 5ft-6.5ft) Product upgrade in 2019. If you are not fully satisfied with your purchase, you are welcome to return it. BILLFET Audio Baby Monitor Radio Nanny

Technical Data:
Receiver /Transmitter:
- Transmission frequency: 2400MHz-2480MHz
- Transmission power: 20dBm
- In room range: 150 square meters
- Operating temperature: 0¡æ-50¡æ
- Storage temperature: 25¡æ
- Operating humidity: 20%-80%RH
- Audio output: 300mW
- Modulation mode: FHSS
- Receiving sensitivity: -88dBm
- Consumption current: min: 25mA max: 125mA
- Power supply: USB 5V 1A

Package Includes :
- 1 x Parent Unit (receiver)
- 1 x Baby Unit (transmitter)
- 2 x USB Charging Cable
- 1 x Instruction Manual

Thank you for your attention. If you have any questions, please contact us anytime. We will help you the fastest to solve the problem.