Video Baby Monitor Wireless With 2.4 Inches TFT 2 Way Audio Talk Night Vision Surveillance Security Camera Babysitter [50 Meters Long Transmission Distance]We have tested it. the max transmission distance between the camera and the display is 50 meters.And the barriers are one glass window and two glass doors.Kindly Remind:The transmission range will be shorter if the material of the wall is concrete. [Screen Built-in 650mAh Lithium Battery] The screen part built-in 650mAh lithium battery, so you can put it anywhere. [Temperature Monitoring] The camera part is with temperature monitoring function, so you can know what the temperature of your babys room is in time, so as not to make your baby too hot or too cold. [Built in 4 Lullabies]The lullabies can comfort your baby fall asleep faster. [Built in LED Light & Automatic Night Vision]The camera built-in soft LED light, you can watch the image when in dark but not influence your baby.Keep an eye on baby all night long with automatic night vision. [Two-way Talk] You can talk with your baby in real time.If you want to see the larger image, you can press the right zoom button. The visual angle is 70 degree. System General: 1. Operating Frequency Range: 2400 MHz-2483.5 MHz 2. Transmitting Power: 17dBm Max 3. Monitor Sensitivity: -88dBm 4. Type of Spread Spectrum TX: FHSS 5. Type of Modulation: GFSK 6. Data Rate: 3Mbps 7.Operating Temperature Range: 0~ +40 degree 8. Operating Humidity Range: 85% RH 9. Environment Rating: Indoor use only Wireless Camera: 1. Image Sensor Type: 1/3" Color CMOS Image Sensor 2. Effective Pixel: H: 640, V: 480 3. Lens: EFL=3.6mm, F=2.8 4. Viewing Angle(Diagonal): 70 degree 5. Night Vision: 5 meters 6. Power Supply: DC 5V (included) 7. Other Special Feature: Built in Microphone/Speaker Wireless Monitor: 1. Display Type/ Size: Color TFT 2.4 inch 2. Resolution(Pixel): 960 x 240 (RGB) 3. Viewing Angle: H: 80 degree, V: 100 degree 4. Power Supply: DC 5V (included) 5. Capacity of the Battery: 3.7V Li-polymer Package included: 1x camera 1xscreen 2x charger adapter 1xuser manual