Q-See QSDT404C 400TV Line of Resolution with 2.4 Wireless Camera and Receiver (320x240 pixels) QVGA, (640x480 pixels) VGA Wireless Camera Receiving Distance &gt;328 ft. 24 Infrared LEDs Providing up to 26 Ft. Night Vision; Built-in Audio Microphone 2.4GHz Digital Wireless Technology, and can receiver up to 4 Wireless Cameras