Astrotel WD1-C/CAM 2.4GHz H.264 Digital Wireless Transmitter with Color CCD Camera and Receiver 2.4GHz wireless audio/video sender; dynamic selection technology to resist interference H.264 wireless digital; color ccd camera Image processor MPEG4 encode/decode; variable video bit rate, up to 12 mbps Uses random ID codes to protect personal privacy; over 4 million sets of random ID codes Camera has 24 IR LEDs for night vision; operating distance up to 1000 feet (clear line-of-sight)