2.4GHz wireless Baby cam. 2” TFT display on monitor. Screen power off automatically and VOX Voice Activation for power saving. Build in Microphone and speaker in both units for two way audio communication. Built-in rechargeable battery in monitor - 540mAh (up to 20 hours in VOX mode) Invisible Infrared light - Night Vision 2 meters. Indicator for noise level in baby room. Sound alert for Out-of-range warning. Image sensor: 1/4 “CMOS. Video resolution: 640x480. Video frame rate: 30 fps. Viewing angle 35 degrees. Range up to 260 meters in open field