260m Transmision Distance The monitor covers a transmission range of up to 160ft/50m indoor,850ft/250m outdoor.You could play built-in lullabies or use the two-way talk back intercom function to comfort your babies whenever you want. Tempertature Monitoring With Temperature Sensor, Supervise Babys Room Temperature All The Day, Help To Care Your Babys Health. Specification: Gernal: 1.Transmission Frequency: ISM 2400~2483.5 MHz 2.Transmission Power: 17dBm 3.Unobstructed Effective Range: 160ft/50m indoor , 850ft/260m outdoor line of sight 4.Spread Spectrum: AFH & TDMA 5.Modulation Mode: GFSK 6.Operating Temperature:? 14 ~ 122?? Fahrenheit / -10 ~ +45?? Celsius 7.Operating Humidity:? <85% Monitor: 1.LCD Size:? 3.2 Inch 2.Resolution Supported:? 320 x 240 pixel 3.Receiving Sensitivity:? -90dBm 4.Consumption Current:? 200mA 5.Battery:? Li-polymer / 750mAh 6.Power Supply:? 5V/1000mA DC 7.Dimensions (W x H x D):? 120mm x 70mm x 17mm Camera: 1.Image Sensor:? CMOS 2.Total Picture Pixels:? 0.3 Mega Pixels 3.Minimum Illumination:? 0 Lux (IR on) 4.Night Vision Distance:? 15 FT (5m) 5.View Angle:? Diagonal 45?? 6.Power Consumption:? 200mA 7.Power Supply:? 5V/1000mA DC 8.Dimensions (W x H x D):? 67mm x 106mm x 67mm