Product Readme Four channel(CH1: 2414MHz\CH2: 2432MHz\CH3: 2450MHz\CH4: 2468MHz) A/V mod/method: FM Antenna: Build in omni-directional antenna Display inch: 1.5"/1.8"TFTLCD Display color: Full color The voice control: Can tune Power: DC5V or 3.6V Li battery Battery last time: 1-2hours Receiver Sensitivity: -83DBM Frequency: ISM 2, 400 - 2, 483MHz Imaging Sensor: 1/3 inch OMNIVISION Color CMOS Horizontal Resolution: 380TV Line CMOS Total Pixels: 628 x 582 (PAL) / 510 x 492 (NTSC) View Angles: 8 Infra-red LED; 62 degrees Minimum Illumination: 0Lux / F1.5 Gain Control: Automatic Transmission Power: 10mW Modulation Mode: FM Antenna: Built-in omni-directional antenna Lens: F6.0mm F 1.8 Dimension(WxLxH): 55x80x280mm( Unbends )