Detailed Product Description Features: 1) 2.4GHz, 1/4" CMOS camera, 380TV lines sharp picture display 2) Receiver has 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) Frequency points for the 4 channel is 2,414MHz, 2,432MHz, 2,450MHz, 2,468MHz, but can be designed for customers especially in range of 2,400MHz to 2,483MHz 7) Solutions: this product is cabinet, transparent and convenient to take and use. This product is suitable for family and office security usage, especially for baby security to avoid all possible dangers. This series of products also can be used in supermarkets, marketplaces, small residence, door surveillance and bird watching 8) Attention: receiver must link with TVs, LCDs, or PCs for monitoring display 9) Caution: this product is be forbidden for illegal usage