Product Description Model No.:842E Feature -- 2.5 inches LCD-TFT with 480x234 resolutions -- Night Vision (Effective range: 5m ) -- Built-in rechargeable Li-battery in camera -- Rechargeable Li-battery in receiver -- Built-in microphone in camera & speaker in receiver for audio monitoring -- 4 channels available to avoid possible interference -- Up to 100m ( 330ft .) transmission range in open space
