Features: 1) 2.4GHz wireless baby monitor 2) 1/3 CMOS image sensor night vision infrared 3) Camera with built-in microphone 4) Range up to 100 meters (unobstructed condition) 5) 4-channel allows up to 4 separate operations Parameters: 1) Pixel: PAL: 628 x 582 / NTSC: 510 x 492 2) Horizontal definition: 320 lines 3) Visual angel: 54 4) Min. illumination: 3 lux/F1.2 5) Display: 2.5 TFT 6) Frequency: 2,414 ~ 2,468MHz 7) Transmission power: 50mW 8) Power: DC12V / 100mA