1/4 inches CCD, 420 TV lines Sharp picture display Tiny size for discreet observation and portability Built-in microphone for audio monitoring 4 channels available to avoid possible interference Specifications: General: Transmission frequency: ISM 2,400 to 2,483MHz Transmission power: 10mW/CE and 2mW/FCC Operating frequency: 2,414, 2,432, 2,450 and 2,468MHz Unobstructed effective range: 100m (minimum) Modulation mode: FM Operating temperature: -10 to +50 degrees Celsius (+14 to +122 degrees Fahrenheit) Operating humidity: ≤85%RH Camera: Imaging sensor type: CCD Picture total pixels: PAL: 628 x 582 NTSC: 510 x 492 Bandwidth: 18MHz Minimum illumination: 5 Lux Current consumption: 120mA (maximum) Power supply: +12V DC Dimensions: (W) 36 x (D) 26 x (H) 45mm Weight: 65g Receiver: Antenna: SMA (50 ohms) Receiving sensitivity: ≤-85dBm Intermediate frequency: 480MHz Video output signal level: 1.1 ±0.2Vp-p, 75 ohms S/N ratio: >38dB Audio output signal level: 3.0 ±1Vp-p, 600 ohms Current consumption: 190mA (maximum) Power supply: +12V DC Dimensions: (W) 78 x (D) 92 x (H) 22mm Weight: 174g