Astrotel WD1-T/R 2.4GHz H.264 Digital Wireless Transmitter and Receiver 2.4GHz wireless audio/video sender; dynamic selection technology to resist interference H.264 wireless digital 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 With IR extender function for remote control the audio/video source; 2.4GHz transmits distance up to 1000 feet (clear line-of-sight)