Detailed Product Description Features: 1) 2.4GHz, 1/4" CMOS camera, 380TV lines sharp picture display 2) Receivers have 4 channels available to avoid possible interference 3) Camera built in microphone for audio monitoring 4) Camera with infrared for day and night vision, weatherproof 5) Open transmission distance: 100 meters 6) Four cameras for multi-monitoring 7) Frequency points for 4 channels: 2,414MHz, 2,432MHz, 2,450MHz, 2,468MHz (we can design for customers especially in range of 2,400MHz to 2,483MHz) 8) The products are cabinet and diaphanous 9) Convenient to take and use 10) Suitable for home and office security 11) Also can be used in supermarkets, marketplaces, small residence and baby rooms 12) Used for door surveillance, bird watching and so on 13) Receivers must link TV, LCD or PC for monitoring displayer 14) Must be forbidden for illegal use