2.4 GHz wireless camera. - 2 "TFT display on the monitor. - The screen is automatically turned off and VOX voice activation for energy saving. - Integrated microphone and speaker for two-way audio communication. - Built-in rechargeable battery on the monitor - 540mAh up to 20 hours in VOX mode - invisible infrared light - night vision 2 meters - noise level indicator in the baby's room - audible alert for out of range warning - image sensor: 1/4 "CMOS . - Video resolution: 640x480.0.