2.4G wireless digital signal transmission, over 250 hopping, without interference WIFI. > Digital Signal encrypted transmission, good security. > Accessible transmission distance of 200 meters, about 15-50 meters away from the wall. > 2.4-inch high-definition LCD screen, the image is displayed more clearly. > Monitors built-in battery, use of time more than 2 hours. > Built-in baby sleep lullaby, you can control the camera screen playback. > Monitors with temperature display, Celsius and Fahrenheit switch. > Baby Monitor with two-way intercom function. > Camera Settings Nightlig . Descriptions: 1.Receiver Screen Size: Full color 2.4 inch TFT LCD Resolution: 320×240(RGB) Viewing Angle: H:80 degree,V: 100 degree Power Requirement: DC 5V Other Special Feature: support up to 4 cameras 2.Camera Image Sensor: 1 / 3'' color CMOS image sensor Pixel: H: 640; V: 480 Lens: EFL=3.6mm.F=2.8 Viewing Angle: 70 degree IR LED Type: 7 pieces IR LED / 850nm Night Vision Distance: 5m Power Supply: DC 5V Other special Feature: Two way speaker; Night Light; temperature detection Product Feature: 2.4 inch TFT LCD screen. 2.4GHz wireless digital technology,no interference, no privacy leak. Built-in night light. Lullaby: make baby more fast & soft to go to bed. Night Vision Distance: Min.5m. 300m transmission range in open area Built-in rechargeable Li-battery in receiver. 300M pixels . Built-in microphone & speaker / two way audio communication. Baby room temperature detection . Package include: 1× wireless monitor 1× wireless camera 2× power adapter 1× user manualBaby Boo